Chapter Summaries

Linde was pulled into the Void World after activating a Timeline Disruptor in the Timeline Observation Room, and his existence was erased from the world he left behind. Gaster told him there was no known way back as Linde watched Frisk search for him.

• Linde entered the Timeline Observation Room and activated a Timeline Disruptor while examining an old photograph.
• A space-time rift opened beneath Linde and dragged him away.
• Frisk searched through past timelines but found no trace of Linde, while Flowey and Sans noticed he had been erased.
• Linde awoke in the Void World and met Gaster, who explained that the Core had shattered him and sent him into the void.
• Gaster told Linde that the Void World had no exit, and Linde watched Frisk searching for him.

Linde learned that he could not return from the Space-Time Rift on his own, but Player appeared and restored his forgotten memories. Player changed Linde’s soul and initiated a reboot to send him and Gaster back to the Main Universe, leaving their consciousnesses caught between rows of data.

• Linde asked Gaster whether he could travel back through the river of space-time, and Gaster explained that loading a save changed the world’s state without erasing the actual past.
• After Linde despaired of ever escaping the void, Player emerged from a rift and awakened him.
• Player restored Linde’s memories of creating his soul, erasing his memories, and sending him into the Main Universe.
• Player used the power of nothingness to blend and scour Linde’s soul until it became translucent gray.
• Player summoned an image of Mount Ebott and began a Point-Target Universe Reboot, causing Linde’s and Gaster’s consciousnesses to merge into gaps between the data.

The player replaced Linde’s soul after the backlash from time’s power nearly destroyed him, leaving him with a gray, translucent soul and a stronger keyboard. Linde reunited with Frisk at Grillby’s, where Sans asked whether they had heard of a talking flower.

• Linde fled Sans’s observation room, but the backlash from the power of time knocked him unconscious and destroyed his soul.
• The player placed a gray soul from a previous timeline into Linde, restoring his consciousness and erasing his memories of the Void World.
• Linde woke in the snow with a gray, translucent soul and a stronger keyboard, then met Frisk, who noticed his changed eyes and worried that he had fought the Dog Couple.
• Linde took Frisk to Grillby’s, where Sans joined them and traded fries with her after she squeezed out too much ketchup.
• Sans asked Frisk whether she had heard of a talking flower, while Flowey listened from the roof and Linde watched him.

Linde took Frisk to a hidden room in Snowdin Forest, where a little white dog named Toby revealed that he had met Linde in the past and warned him that the Game Bug Detector would try to kill and erase him. Frisk was left outside the room, where she sensed someone approaching.

• Sans told Frisk that a mysterious flower secretly whispered to Papyrus, and Frisk suspected Flowey was responsible.
• Linde took Frisk to a hidden room and opened its locked door by sending the character for “release” toward it.
• Linde and Frisk met Toby, a talking little white dog, who sent Frisk outside so he could speak to Linde privately.
• Toby told Linde that they had met about forty thousand years earlier and that Linde had not yet traveled back to the past.
• Toby warned Linde that the Game Bug Detector considered him a bug and would try to kill and erase him if it could not drive him out.
• Frisk sensed someone approaching while she waited outside the closed door.

Linde and Frisk visited Grillby, whose story about Rudy’s daughters led them to southern Snowdin to meet Dess and Noelle. They realized Asgore was visiting Rudy and heard the king and Rudy approaching as they tried to leave.

• At Grillby’s, Grillby explained that he had stopped talking after years of rarely speaking in Hotland, and the customers cheered when they heard him speak.
• Grillby told Linde and Frisk that Rudy’s daughters had once built him a snowman, and he gave them directions to Rudy’s home in southern Snowdin.
• Linde and Frisk explored Snowdin’s fountain plaza and went to Rudy’s house, where Dess greeted them and called her shy younger sister, Noelle, out from hiding.
• Linde spotted Asgore’s trident at Rudy’s house, and Dess said Rudy and Asgore had gone for a walk together.
• Linde and Frisk tried to make a quick escape when they heard Rudy and Asgore approaching the gate.

Rudy and Asgore found Linde and Frisk at Rudy’s home, and Asgore invited them to tea before revealing his plan to wait at the Throne and asking them to kill him. After Asgore left, Linde revealed that he had been hiding a phone and addressed someone as “Mom.”

• Rudy rushed into his home and found his daughters safe with Linde and Frisk, while Asgore followed and was startled to see the human children.
• Noelle and Dess pleaded with Asgore to spare Linde and Frisk, and Rudy gathered his daughters into his arms.
• Asgore made tea for Linde and Frisk, then told Linde that he felt he knew him from long ago.
• Asgore confessed that he had killed the six humans who fell into the Underground and asked Linde and Frisk to kill him after their journey.
• Asgore left for the Throne after Rudy promised to support him, and Linde took out a hidden phone and called out to “Mom.”

Linde called Toriel while he and the children met Asgore, and hearing Asgore’s confession helped Toriel realize she had never truly blamed him. She decided to speak with him, while Linde and Frisk ended the day bickering.

• Linde called Toriel and told her he and the children were about to meet Asgore, and she reluctantly agreed to listen from the phone.
• Toriel overheard Asgore ask the children to kill him and understood that he had carried his burden to give monsters hope.
• After Asgore left, Linde asked Toriel what she thought, and she admitted she had been blaming him for her own regret and helplessness.
• Toriel looked at a family photograph, thanked Linde, and said she knew what she needed to do next.
• Linde advised Toriel and Asgore to have a proper talk, then Frisk tripped him while Noelle watched.

Linde used the power of nothingness to give Frisk the ability to save and load, but their struggle over their soul projections pulled them into her memories. He learned that Frisk was taken from her aunt’s family after a court case and later lived in an orphanage; the chapter ended with Linde comforting her and leaving the memory space.

• Linde broke through Frisk’s soul barriers, allowing her to save and load wherever she wanted.
• Frisk and Linde grabbed each other’s soul projections, and their souls collided, drawing them into Frisk’s memories.
• Linde saw Frisk as a toddler being taken home by her aunt and cousin Squeezie.
• A court case and DNA test led to Frisk being taken from her aunt’s family and sent to an orphanage at age four.
• Frisk admitted to Linde that she had come to the underground to escape, and Linde hugged her before they left the memory space.

Linde and Frisk reached Waterfall and entered the Gray Door, where they met Gaster, who revealed that they had helped prevent him from falling into the Core three hundred years earlier. After Gaster left, Linde told Frisk some of what he knew while keeping his origins secret, and they continued onward without a clear lead.

• Linde and Frisk left Snowdin, passed Sans at the Waterfall Outpost, and continued into Waterfall.
• Linde and Frisk found the Gray Door and entered to meet Gaster.
• Gaster said he recognized Linde and Frisk and revealed that they had helped him avoid falling into the Core three hundred years earlier.
• Gaster told Linde to bring Grandpa Semi back and left to rejoin those who had followed him.
• Linde explained some of the situation to Frisk but kept his otherworldly origins secret, and they decided to proceed one step at a time.

Linde stopped Undyne from transforming after she attacked him and Frisk, then used a syringe from Gaster to give her a body capable of holding determination. The chapter ended with Sans and Gaster talking in Waterfall about Linde.

• Undyne attacked Linde and Frisk, accusing them of using an illusion to control Asgore after he ordered monsters to treat humans kindly.
• Linde froze Undyne to prevent her from melting as determination formed inside her, then called Flowey, Sans, and Gaster for help.
• Flowey suggested loading a save, but Linde refused because it would not resolve Undyne's misunderstanding.
• Gaster gave Linde a syringe containing a substance that could let monsters hold determination, and Linde injected it into Undyne.
• Sans and Gaster sat beside a telescope in Waterfall and discussed how long they had known about Linde.

Undyne’s determination transformed her into a powerful new form, and she fought Linde and Frisk in Waterfall. As they struggled to withstand her attacks, Linde tried to use his own soul projection against her.

• Undyne broke free of her restraints and spoke about humanity’s strength and the hope Asgore represented to monsters.
• Undyne tore off her eye patch and, powered by determination, transformed into a towering, radiant figure.
• Undyne attacked Linde and Frisk with spears, giving them weapons to block with and keeping the fight fair.
• Undyne changed their green souls back to normal and lunged at them with her spear.
• Linde dodged Undyne’s attack and thrust his soul projection toward her soul.

After recognizing Linde’s right to enter the monster kingdom, Undyne learned that her growing power was determination, while Alphys accepted Linde’s use of the vial to save her. The hostile entity prepared to erase the universe and chose Ye Yu as its vessel, leaving Linde with about ten days to prepare.

• Undyne related to the burden Asgore had carried and recognized Linde’s right to enter the monster kingdom, while Linde warned her to be careful with her determination.
• Alphys reflected on Undyne’s rescue and stopped worrying that Linde had used the vial, trusting his promise to save the Amalgamates.
• A hostile consciousness decided to erase and restart the universe, then looked to Blue Star for a vessel.
• Toby the Little Dog warned Linde that he could hold the entity off for about ten days, prompting Linde to resolve to practice magic.
• Ye Yu died when a runaway dump truck struck him, and the entity placed his consciousness in a black-and-white body and demanded more determination.

Linde studied Alphys's history books and used a magic technique to see Chara's remnant soul. Chara led him to a hidden room near Napstablook's house, where Chara strengthened a blurry figure before leaving to nourish their soul through Frisk's.

• Linde read Alphys's manga and worked out how to reproduce the magic in it, wondering why he could understand Gaster's magic but not the Bone Brothers'.
• Frisk browsed Alphys's books, found The Magic Warrior and the Crest of Taint, and put it in her inventory without reading it.
• Linde used Eye of True Sight and spotted Chara's remnant soul, then admitted to Chara that he could see them.
• Chara told Linde that they had let go of their hatred for humans and reminded him that he had once asked them for a favor.
• Linde informed Undyne and Frisk, then followed Chara to a hidden room near Napstablook's house.
• Chara circled the indistinct white figure in the room, making it grow more solid, then left to nourish their soul through Frisk's.

Linde met Semi, the elderly skeleton and Papyrus and Sans’s grandfather, who said he would tell Linde important things later. Linde began reading a comic that gathered a strange magical aura, while Papyrus brought Semi to Sans, who already knew who he was.

• Semi introduced himself to Linde and said he had known Gorson since the same era.
• Papyrus arrived for training and excitedly met Semi, while Semi joked that Papyrus still had much to learn.
• Undyne recognized Semi through stories from Gorson and told Papyrus to spend the day with his grandfather.
• Semi invited Linde to visit Papyrus’s house later, then went home with Papyrus.
• Linde read a comic from his inventory as Frisk tried to take it away, and an unsettling magical aura gathered in his hand.
• Papyrus brought Semi to Sans, who immediately recognized him as their grandfather, leaving Papyrus bewildered that Sans had known already.

Ye Yu learned that the Self-Error-Correction System had removed his emotions and planned to send him into the Undertale universe to defeat Linde and Frisk. Meanwhile, Linde discovered he came from 2024 and learned about the future before returning to his mock battle with Undyne.

• The Self-Error-Correction System told Ye Yu that Linde and Frisk were his main obstacles and urged him to collect LOVE, while concealing its true reasons for suppressing his emotions.
• The Self-Error-Correction System headed toward the Undertale universe to fight the dog and seek a chance to send Ye Yu through a World Rift.
• Frisk told Linde that the year was 2359, and Linde explained that he was from 2024.
• Linde asked Frisk about the future, learning that the gaming industry had changed after the Third World War and that Detective Conan was still in sixth grade.
• Linde found that Undertale did not exist in this world, then stood up to resume his mock battle with Undyne.

Linde learned to defend against Undyne’s physical attacks, and Semi warned him and Frisk not to force their way through time and space. At the Throne, Flowey warned Asgore that a soulless being with terrifying determination was coming.

• Linde trained with Undyne, dodging her magical attacks until she struck him with a physical spear he could not sense.
• Linde copied the physical attack’s fluctuations, while Semi arrived and explained that he had asked Gaster to build the Timeline Observation Device.
• Semi told Linde and Frisk that two human mages had once used time powers to save monsters during the war and warned them not to force their way through time and space.
• Semi left to stay with Gorson, and Linde joked about puns as he went.
• Flowey warned Asgore that something terrifying was approaching: a soulless being with frighteningly strong determination.

Linde, Frisk, and Undyne traveled toward the crowded Royal Capital, meeting Papyrus and Alphys and discussing the Amalgamates and Linde’s dark magic along the way. Beyond the universe, Player told Ink Sans that Linde’s arrival had split off a new universe, then agreed to stop interfering.

• Monsters from across the Underground gathered at New Home after the king called them there, and Linde and Frisk set out for the Royal Capital with Undyne.
• Papyrus joined the travelers, while Semi said Sans had gone off to use a shortcut.
• At the Laboratory, Alphys introduced the Amalgamates and explained that she had taken responsibility for them and was researching a restorative potion.
• Alphys, Frisk, and Undyne discussed her manga while Linde studied dark magic and renamed the Corruption Mark the Weakening Mark.
• Frisk warned Linde not to let the dark magic corrupt him, but he assured her he would know where to draw the line.
• Player told Ink Sans that Linde’s arrival had split a new universe from the Original Universe, and they agreed to stop interfering.

Linde and Frisk received the Fox Mask from Ceroba and reunited Toriel and Asgore, but Frisk suddenly lost the ability to load. Toby warned Linde that a troublesome character had been thrown into the Universe and left him to deal with it alone.

• Linde and Frisk served as test subjects while Gaster and Alphys conducted experiments, but their research produced only a tiny drop of liquid.
• Axis brought Linde and Frisk to Ceroba, who gave Linde the Fox Mask he had once asked her to keep for him.
• Frisk reunited with Toriel in New Home, and Toriel and Asgore talked until they seemed to become friends again.
• Frisk told Linde they could no longer load, and Toby warned that a troublesome character had been thrown into the Universe and Linde was on his own.

Ye Yu began hunting monsters after discovering that the Ruins had been evacuated to the Royal Capital, while Asgore locked Frisk and Linde away rather than let them face him. Ye Yu killed Decibat in the Dalv House and headed toward southern Snowdin.

• Ye Yu woke in the Ruins and learned from the subsystem that the monsters had taken refuge in the Royal Capital, so it directed him toward the lower level.
• Asgore locked Frisk and Linde behind iron bars, explaining that Ye Yu could absorb their souls and rewind time, and refused to let them fight him.
• Linde battered the bars with his determination, but they did not bend.
• Ye Yu hunted Decibat, whose soul-targeting sound attacks had no effect on him.
• Decibat ambushed Ye Yu from beneath a bridge, but Ye Yu blocked him and killed him with his blade.
• Ye Yu noted that Decibat had made him reload once and left the Dalv House for southern Snowdin.

Ye Yu traveled to the Royal Capital to kill the gathered monsters and fought Darbat, who discovered that physical attacks could hurt him. Ye Yu killed Darbat, while the Royal Guard arrived and the Error-Checking System denied ordering the massacre.

• The Subsystem supported Ye Yu as he headed to the Royal Capital, unaware that his discomfort vanished when he thought about slaughter.
• Darbat saw Ye Yu killing monsters and warned them that physical attacks could harm the soulless attacker.
• Darbat dodged Ye Yu’s blade with his sound-wave sensitivity and fought back with lightning as the Royal Guard hurried toward them.
• Darbat unleashed a massive wave of lightning, but Ye Yu cleaved it apart with a powerful strike.
• Darbat asked Ye Yu why he was killing, then turned to dust when Ye Yu struck him down.
• The dark clouds dispersed, the Royal Guard arrived, and the Error-Checking System protested that it had only wanted Ye Yu to kill Linde.