Chapter Summaries

Xi Yan and Luffy infiltrated the Underwater Great Prison by disguising themselves as Broggly and controlling two guards. After learning that Ace was held on Level 5 and the routes downward were watched or locked, they set out to find the first-floor Great Gate and continue their stealthy rescue.

• Xi Yan used a Shadow Clone to watch the prison entrance, then disguised himself as a shark and controlled a Broggly to enter the prison with Luffy hidden in his clothes.
• Xi Yan revealed himself inside the hunting entrance and controlled two guards with his Mangekyō Sharingan, while Luffy emerged from his clothes.
• The guards told Xi Yan that Ace was on Level 5, the prison had five known levels and rumors of a sixth, and surveillance Den Den Mushi watched the elevators and corridors.
• Xi Yan learned that Great Gates and spiral staircases connected the floors, but the gates required keys that were likely held by Warden Magellan; he considered cutting through one quietly instead.
• Xi Yan discovered from the guards that the Gate of Justice Switch was in the first floor's Power Room, then dismissed them and headed with Luffy toward the Great Gate.

Xi Yan and Luffy searched for a way through the prison while avoiding traps, and Xi Yan used an illusion to silence prisoners who tried to enlist them. They encountered Buggy being chased by Broggly, and Xi Yan’s illusion made the pursuers leave, though Buggy soon argued with them.

• Xi Yan abandoned the idea of using Earth Release to reach the next floor and led Luffy toward the Great Gate.
• Xi Yan rescued Luffy from falling steel spikes and cut down poisoned Fish Spears as they crossed the prison corridors.
• Pirates in C Area asked Xi Yan and Luffy to free them, but Xi Yan used an illusion to terrify the loudest prisoners before leaving with Luffy.
• Buggy fled from several Broggly, who struck him with axes, but his Chop-Chop Fruit let him reassemble and keep running.
• Xi Yan used an illusion to make the Broggly leave, and Buggy celebrated his escape before accusing Xi Yan of calling him Red Nose.

Xi Yan and Luffy encountered Buggy while escaping through Impel Down, and Buggy agreed to guide them toward Ace after Xi Yan pressured him to come along. They traveled underground, leaving Buggy anxious about the dangerous levels ahead but committed to following them.

• Buggy ran from the Broggly and asked Xi Yan and Luffy to take him underground, claiming he knew how to reach Ace.
• Xi Yan used Earth Release Technique to bring Buggy underground with them and explained that he was a Ninja, prompting Buggy to ask about Wano Country and Mr. Oden.
• Buggy told Luffy and Xi Yan that Mr. Oden had spoken of Ninja and samurai in Wano Country and had shared delicious Oden with them aboard their ship.
• Xi Yan challenged Buggy's vague directions to Ace and threatened to expose his Pirate King crew connection unless he continued with them.
• Buggy agreed to follow Xi Yan and Luffy deeper into Impel Down, while Xi Yan promised to hold off Magellan if they encountered him.

Xi Yan, Luffy, and Buggy reached Level One by passing beneath the Great Gate, but Sword Trees and Needle Grass roots blocked their underground route to the huge hole entrance. As they prepared to travel above ground, Buggy explained his resentment toward Shanks.

• Buggy told Xi Yan and Luffy about a passage from Crimson Lotus Hell to Level Two, and Xi Yan proposed using Earth Release Technique to get through the Great Gate.
• Xi Yan confirmed he could pass beneath the Great Gate and carried the three of them through to Level One.
• Xi Yan cut apart a sharp red root in Crimson Lotus Hell, and Buggy identified the underground growth as roots of Sword Trees and Needle Grass.
• Xi Yan found the roots packed too densely and deeply for underground travel, so Buggy proposed flying above ground with his Chop-Chop Fruit ability.
• Xi Yan called Buggy's Devil Fruit ability mediocre, prompting Buggy to explain that Shanks had overshadowed him and disappointed him by refusing to pursue the Pirate King title.
• Xi Yan prepared to take the group toward the huge hole entrance above ground.

Xi Yan, Luffy, and Buggy escaped through Crimson Lotus Hell, but Navy guards spotted them and alerted the prison. Meanwhile, Hancock distracted Magellan by asking to see Ace, buying the fugitives time as they entered Beast Hell.

• Buggy flew Xi Yan and Luffy through the forest, but Xi Yan destroyed an Image Den Den Mushi and told Buggy to hurry while he cut down the other cameras.
• Guards recognized Xi Yan and Luffy from their Wanted Orders and reported that the trio had entered Beast Hell on the Second Floor.
• Magellan met Hancock and Momonga, poisoned Hannibal during their argument, and received a report of an intruder in the prison.
• Hancock asked Magellan to take her to Ace, distracting him from the intruder report and delaying his response.
• Domino followed Hancock out, while Hancock glanced at the Den Den Mushi and thought she could still help Xi Yan.

Sengoku learned that Luffy and Blood-Eyed Ninja Xi Yan had infiltrated the Underwater Great Prison, likely to rescue Ace, and ordered Magellan to keep them confined rather than send immediate reinforcements. As the Navy prepared for the coming war with Whitebeard, the remaining Shichibukai arrived at Navy Headquarters.

• Sengoku received an emergency report that Straw Hat and Blood-Eyed Ninja Xi Yan had been spotted on the Underwater Great Prison’s Second Floor, Beast Hell.
• Sengoku and Garp realized the two were probably trying to rescue Fire Fist Ace, while Garp privately hoped they would succeed.
• Sengoku decided not to send an Admiral and ordered Magellan to keep Xi Yan confined, giving him intelligence on Xi Yan and Straw Hat and access to Navy troops if needed.
• Sengoku and Garp argued over Garp’s pride in Luffy, and Sengoku confiscated and ate Garp’s senbei.
• Sengoku said he would send an Admiral if Straw Hat and Xi Yan actually rescued Ace, but kept the Admirals available in case Whitebeard attacked Navy Headquarters.
• A communications soldier reported that the Shichibukai had arrived except for Boa Hancock and Jinbe, and that Tsuru had stopped Doflamingo from making Navy men attack each other.

Xi Yan, Luffy, and Buggy entered Beast Hell on the Second Floor of the Underwater Great Prison, where Xi Yan controlled a Demon Beast and used Susanoo to defeat a giant creature. After guards broadcast that intruders had been spotted, the three continued onward, with Buggy deciding to stick with them.

• Luffy, Buggy, and Xi Yan reached the Second Floor, where Xi Yan controlled a Little Hippo that attacked a mantis wearing a guard's cap.
• A broadcast alerted the Second Floor guards to two intruders and one criminal, and Xi Yan suspected an Image Den Den Mushi had recorded their entry.
• Buggy considered leaving but chose to continue with Xi Yan and Luffy, while Luffy insisted on saving Ace.
• Xi Yan confronted a giant Demon Beast, formed Susanoo around himself, and smashed the creature through a wall with one punch.
• Buggy tried to chip off Susanoo, then learned it was energy rather than gold and said he would seek treasure after they returned to the sea.

Xi Yan, Luffy, Buggy, and Mr. 3 made their way through Impel Down’s second floor, where Xi Yan defeated the Sphinx guarding the Great Gate to the third floor. They headed for the next level, with Mr. 3 joining their attempt to rescue Ace after Xi Yan promised to handle Magellan.

• Buggy retrieved the keys from the destroyed monitoring room and released the imprisoned pirates, but they soon fled back into their cells because of the Demon Beasts.
• Xi Yan learned the Great Gate was guarded by the Sphinx and encountered Mr. 3, who recognized Luffy and offered to help before refusing to face Magellan.
• Xi Yan warned Mr. 3 that ten Navy warships waited outside and recruited him by offering to take him along and deal with Magellan himself.
• The group reached the Great Gate, where the Sphinx attacked them while shouting about noodles.
• Xi Yan blocked the Sphinx’s strike with Susanoo and punched the creature unconscious, clearing the way to the third floor.

Xi Yan, Luffy, Buggy, and Mr. 3 crossed the scorching third floor and found Bon Clay, who agreed to help them reach the Fourth Floor and rescue Ace. On the Sixth Floor, Hancock secretly told Ace that Luffy and his companions were coming to save him before leaving with Momonga for Navy Headquarters.

• Xi Yan and his companions explored the desert-like third floor, learned it was a hunger hell, and found its prisoners too weak to tell them the route down.
• Luffy recognized Bon Clay’s voice, and Xi Yan and the others found him alive in a cell.
• Bon Clay agreed to help Luffy rescue Ace, and Mr. 3 prepared to free him while Xi Yan said he had brought food.
• Hannibal brought Hancock to Ace’s cell, but Magellan attacked the prisoners after they mocked him.
• Hancock told Ace that his younger brother had come with companions to save him, then left with Momonga for Navy Headquarters.
• Jinbe reacted with disbelief when Ace revealed what Hancock had told him.

Luffy and Xi Yan’s group ate, then fought through the Brogglies on the third floor as they continued toward Ace. Magellan learned of the intruders’ strength and sent Sadi-chan and the Jailer Beasts to guard the route to Level 5, while preparing to confront them himself.

• Xi Yan fed Luffy, Bon Clay, Buggy, and Mr. 3 before leading them onward, and learned through his Shadow Clone that Hancock had safely left with Vice Admiral Momonga.
• Luffy and Bon Clay attacked the Brogglies surrounding the group and knocked several unconscious, while Xi Yan led the others through the fight.
• Saldeath admitted the Brogglies could not stop the intruders, and Magellan ordered him to take them to the Second Floor to suppress the riot.
• Magellan told Sadi-chan that the Blood-Eyed Ninja might be immortal, and she eagerly asked to handle him before Magellan ordered her and three Jailer Beasts to guard the entrance to Level 5.
• Magellan assigned Hannibal to guard the entrance to the third floor, but his stomach began rumbling again and he called for a mobile toilet.

Xi Yan's group reached the chimney leading to Blazing Hell, fought off the Minotaur, and Xi Yan hypnotized the beast into joining them. The group began descending toward the Fourth Floor on a shattered platform, hoping to reach Emporio Ivankov and rescue Ace.

• Bon Clay led the group to the chimney, and they chose it to avoid Magellan at the Great Gate.
• Luffy used Gear Third to strike the Minotaur and send it crashing through prison buildings, but the beast soon recovered and pursued them.
• Bon Clay told Luffy and Xi Yan that he hoped to meet and rescue Emporio Ivankov on the Fourth Floor.
• Xi Yan hypnotized the Minotaur, turning the Jailer Beast into an ally.
• Xi Yan smashed the chimney platform, sending the group downward toward Blazing Hell on a falling slab.

Xi Yan and the prisoners fought their way toward the Great Gate to Level 5, where they clashed with Sadi-chan and the Jailer Beasts. Xi Yan captured Sadi-chan with Susanoo as Magellan learned the intruders were nearing Level 5 and rushed to confront them.

• Xi Yan carried Buggy, Luffy, Mr. 3, and Bon Clay down to the Fourth Floor, where Luffy knocked aside guards blocking their route to the Great Gate.
• Sadi-chan sent the Jailer Beasts to stop the group, but the Cow Jailer Beast attacked its fellow beasts while Luffy and Xi Yan fought the others.
• Xi Yan sent the Zebra Jailer Beast crashing into the Great Gate, breaking its lock and opening the way to Level 5.
• Sadi-chan whipped Buggy and Mr. 3, then attacked Xi Yan with her Haki-coated whip, but Xi Yan caught it and used Susanoo to seize her.
• Magellan learned the intruders were about to reach Level 5, ordered Hannibal to guard the area, and hurried out to face them.

Xi Yan fought Magellan while Luffy and the others were overcome by poison in the Underwater Great Prison. Magellan poisoned Luffy with a mixture he claimed had no cure, leaving Xi Yan and Bon Clay searching for a way to save him.

• The Kora Jailer Beast struck Bon Clay toward the Blood Pool, but Luffy caught him and pulled him to safety.
• Magellan arrived amid purple toxic gas, and Xi Yan used Minotaur to confirm that the Jailer Beast was under his hypnosis.
• Xi Yan shielded the others from Magellan’s Poison Dragons, then used Kido Mitama Son to evade a poison attack and strike Magellan with a powerful punch.
• A Poison Dragon circled around and swallowed Luffy, leaving him badly poisoned, so Xi Yan ordered Bon Clay to find an antidote.
• Magellan revealed that he had used several mixed toxins on Luffy and claimed there was no cure.

Xi Yan fought Magellan while Bon Clay, Buggy, and Mr. 3 tried to get Luffy to Level 5 and find Emporio Ivankov, who Bon Clay believed could save him. The chapter ended with Xi Yan still battling Magellan as the others dragged Luffy through the Great Gate into the freezing level.

• Xi Yan threatened to kill everyone and sink the prison if Luffy died, while Bon Clay remembered Emporio Ivankov might be able to save him.
• Xi Yan sent Bon Clay, Buggy, Mr. 3, and Luffy toward Level 5, using Minotaur to carry Luffy while he stayed behind to hold Magellan off.
• Xi Yan created a Shadow Clone with a sample of Luffy's poison and sent it to search the medical room for an antidote.
• Magellan's poison corroded Xi Yan's Susanoo and injured him, but Xi Yan restored his body and continued fighting with his abilities.
• Bon Clay and Mr. 3 placed Luffy on a Candle Sleigh after Minotaur collapsed, then entered the freezing Level 5 with Buggy following.

Xi Yan searched the medical room for an antidote to Magellan’s Mixed Toxin while his Shadow Clone fought Magellan on the Fourth Floor. With no antidote available, the medical soldiers began researching the venom, and the exhausted Xi Yan restored his strength and prepared to fight again.

• Xi Yan knocked out prison guards, used Sharinggan Illusion to learn where the medical room was, and entered it.
• Xi Yan controlled the medical soldiers and learned they had no antidote for Magellan’s Mixed Toxin, so he ordered them to study the venom sample.
• On the Fourth Floor, Magellan struck Xi Yan during a moment of mental exhaustion, but Xi Yan removed the poison and recovered.
• Magellan killed pirates who tried to escape through the chaos, then suspected Xi Yan’s ability was reaching its limit.
• Xi Yan used Takemitsuhiko no Mikoto to restore his condition and Dojutsu power, summoned Susanoo, and challenged Magellan to a second round.

Xi Yan defeated Magellan after the warden's stomach trouble caused him to lose control, then headed to Level 5 to find Luffy and the others. Ivankov learned from a newspaper that Xi Yan had killed three Celestial Dragons and sent Inazuma to bring him to the New Okama Kingdom, while Xi Yan learned that the others had gone toward the Military Wolves' territory.

• Xi Yan's Shadow Clone failed to help the Medical Soldiers create an antidote for Magellan's mixed toxin, leaving him to hope Ivankov could save Luffy.
• Magellan charged Xi Yan despite his worsening stomach pain, but Xi Yan struck him into the rubble, where Magellan suffered an embarrassing accident and vowed revenge.
• Xi Yan left for Level 5, and Ivankov and Inazuma watched the battle before reading a newspaper report that Xi Yan had killed three Celestial Dragons.
• Ivankov ordered Inazuma to bring Xi Yan to the New Okama Kingdom, believing he had held Magellan back to buy time for Luffy and the others.
• On Level 5, Xi Yan learned from a prisoner that Luffy and the others had headed toward the Military Wolves' territory, then ran after them.

Magellan warned Sengoku that Blood-Eyed Ninja Xi Yan could burrow through the prison’s rock floors and might already know where Fire Fist Ace was held. Sengoku sent Borsalino to retrieve Ace while Magellan prepared to stop the intruders, leaving the Navy racing to move Ace before Xi Yan found him.

• Magellan dismissed his guards to treat the wounded and summon Hannibal, then worried that Xi Yan’s hypnosis could reveal Ace’s location.
• Magellan told Sengoku that Xi Yan had survived being killed repeatedly and could use Earth Release Technique through the prison’s rock floors.
• Magellan urged Sengoku to move Ace to Navy Headquarters before Xi Yan could reach him, and Sengoku agreed to send Borsalino.
• Sengoku summoned Borsalino and ordered him to retrieve Ace rather than fight Xi Yan, since the Navy could not spare an Admiral for a prolonged battle.
• Borsalino departed for the Underwater Great Prison, while Sengoku hoped Magellan would get Ace out before Xi Yan found him.

Magellan moved Ace to the transport route ahead of schedule while Jinbe refused to betray Whitebeard. On Level 5, Xi Yan found Inazuma and entered the hidden New Okama Kingdom, where he learned Luffy was being treated and Bon Clay had not yet awakened; Buggy and Mr. 3 fled the wolves toward the Fourth Floor.

• Magellan ordered Hannibal to shut down the surveillance and took Ace from his cell, while Jinbe rejected Magellan’s offer to help the Navy fight Whitebeard.
• Xi Yan fought off a pack of Military Wolves, and Inazuma emerged from the Abandoned Guard Room and offered to lead him to Luffy and the others.
• Inazuma guided Xi Yan through a hidden door into the New Okama Kingdom, where the prisoners welcomed Xi Yan and he learned Luffy had received treatment from Ivankov while Bon Clay remained unconscious.
• Inazuma told Xi Yan that only Luffy and Bon Clay had been brought to the kingdom, and Xi Yan asked to see Ivankov.
• Buggy and Mr. 3 decided to escape toward the Fourth Floor rather than freeze on Level 5, then ran as Military Wolves charged after them.

Xi Yan learned that Luffy was undergoing a painful two-day treatment to survive Magellan’s poison, then set out to rescue Ace before his public execution. Ivankov revealed that he would stay behind for now, and was stunned to learn that Luffy was Dragon’s son.

• Ivankov explained that Luffy was fighting Magellan’s poison through a painful treatment and warned Xi Yan not to open the gate or interrupt it.
• Xi Yan saw Luffy’s bloodied condition, accepted that the treatment had to continue, and learned Luffy might need two days to survive.
• Xi Yan learned Bon Clay had been injured protecting Luffy, and told Ivankov that Bon Clay had come to Impel Down hoping to rescue her.
• Xi Yan announced that he would rescue Ace before the public execution and learned from Ivankov that Ace was on Level 6.
• Ivankov declined Xi Yan’s offer to leave, explaining that he was waiting for the Revolutionary Army’s Dragon to act.
• Xi Yan told Ivankov that Dragon was Luffy’s father, shocking Ivankov, who began to believe it after learning Luffy was from East Blue.

Ivankov learned that Luffy and Ace were both Dragon’s sons and joined Xi Yan in preparing to rescue Ace from the Sixth Floor. As the group set out, Borsalino took custody of Ace while Magellan vowed to keep Blood-Eyed Ninja from escaping.

• Ivankov realized Ace was Luffy’s brother and ordered Inazuma to check whether Ace remained on the Sixth Floor.
• When the Sixth Floor surveillance failed, Ivankov announced that the New Okama would break out after Luffy finished his treatment, and she and Xi Yan prepared to investigate.
• Xi Yan told Ivankov that Kuma had saved the Straw Hat Pirates at Sabaody, prompting Ivankov to plan to seek out her old friend after escaping.
• Borsalino took Ace from Magellan and prepared to return him to Navy Headquarters, while Magellan vowed to keep Blood-Eyed Ninja imprisoned.