Chapter Summaries

After the fused timeline’s human and Save Point were destroyed, Satsujin and Kyuuseishu separated their Amalgamate forms and joined the other Sanses for a debrief. The Sanses introduced themselves, then Agem helped Triple Causality return to their own timelines while Killer opened a rift for the others to head home.

• Satsujin and Kyuuseishu met on the MTT Hotel roof after confirming that the human and Save Point in the fused genocide timeline had been destroyed.
• Satsujin used emerald energy to separate the Amalgamate forms, freeing seven Sanses from the fusion.
• The Sanses discussed how their timelines had been interwoven and introduced themselves by their names and histories.
• Agem offered to help the members of Triple Causality return to their own timelines, and they entered the Space-Time Rift together.
• Killer opened another Space-Time Rift and suggested that the remaining Sanses go home and sleep.

Green fought a human who kept attacking her, but the battle paused when her takeout arrived. After the human destroyed the food, Green became furious and threatened to kill it.

• Green asked Killer to buy her food from the Golden █rches, and Killer showed her that she had already ordered an extra portion.
• Green began fighting the human, who attacked with a Burger █ing burger and dodged her bones and Shock Waves.
• Green chased the human in a car, then fought its knife with a glowing rubber chicken that transformed the Wind Sword into a roc.
• A mouse cursor slashed Green and sent her flying, but Killer's takeout arrived before the fight could continue.
• The human's bullet destroyed Green's takeout, and Green twitched with rage as she threatened the human.

Green fought the human child in the corridor after her McDonald's bag disintegrated, attacking with an assortment of weapons. After exhausting her guns and missiles, she vanished to retrieve a treasured weapon, leaving the fight unresolved.

• Green mourned the disintegrating McDonald's bag, then threatened the human for slashing her favorite jacket.
• Green used a WhatsApp sticker to summon a green lightsaber and attacked the human, who dodged her strikes.
• Green fired a handgun at the human, but it evaded the bullets and shot back.
• Green switched to an assault rifle that fired miniature missiles, then dual-wielded rifles and pinned the human beneath a barrage.
• After emptying both magazines, Green vanished from the corridor to fetch a treasured weapon.

Green piloted her giant mech against the human to avenge McDonald's, but the mech suddenly vanished. She activated a glowing core that transformed her into an armored, robotic figure and claimed she had joined the Avengers.

• Green fired her mech's machine gun at the human, who shot at the bulletproof glass protecting her.
• Green launched a Homing Missile that exploded in the corridor and brought it close to collapse.
• Green's mech suddenly vanished, and she used Gravity Magic to land safely.
• Green touched the blue core in her chest and transformed as special metal covered her body.
• Green spoke in a robotic voice and told the human she was now an Avengers member.

Green fought the human in her powered armor, boasting and imitating superhero movies as they rose into the sky. After the human slashed her core and disabled her armor, Green fell toward her seaside house and scrambled for a way to avoid crashing.

• Green flew around in her armor, fired energy blasts at the human, and taunted them with superhero lines.
• Green grabbed the human and flew upward through the roof, where the human slashed her core.
• Green's smoke generators stopped, and she kicked the human away before beginning to fall.
• Green admired her seaside house from the air, then realized she was about to crash and needed to find a way to survive.

Green survived her fall by deploying smoke and sound effects, then discovered that the human had barely been injured. She began setting up her next attack with a gigantic Determination Extractor and new background music.

• Green used smoke and a neck-snap sound effect to survive hitting the ground.
• Green found that the human had only injured a fingernail after the fall, but the human slashed her when she whispered to them.
• Green removed the armor from her face and announced that Berry had not delivered the speakers she had requested.
• Green summoned a gigantic Determination Extractor and played One Left, then changed the audio source to a higher-quality version.

Green ended his story abruptly, and Killer, Insanity, and Murder set off to investigate a strange pacifist route. In that route, Sans woke from a vivid nightmare in which the human killed him and Papyrus checked on him.

• Green refused to continue his story, and Killer left the Space-Time Rift with Insanity and Murder.
• Killer opened a Rift to a pacifist route that she sensed had gone off course, and the three entered it to investigate.
• Sans was struck by the human's second slash and died after stumbling toward a pillar.
• Sans woke from the nightmare, shaken by how real it felt and wondering whether it had been prophetic.
• Papyrus found Sans awake at night and asked if he had had a nightmare.

Sans hid the details of his nightmare from Papyrus, who carried him upstairs to bed. Meanwhile, Killer and Murder searched Snowdin for Insanity and clues about a dangerous deviation in the pacifist timeline, deciding to look for this world's Sans at Grillby's.

• Sans remembered a nightmare in which he slashed his brother across the chest, but told Papyrus he did not want to discuss it.
• Papyrus tried to cheer Sans up with plans to check the puzzles the next day, then carried him upstairs after Sans joked about the stairs.
• Killer and Murder searched Snowdin for the missing Insanity while trying to determine how far the human had progressed in the timeline.
• Killer explained that a small deviation in the pacifist timeline could eventually lead to the Underground's destruction.
• Murder suggested checking Grillby's to find this world's Sans, and Killer agreed that it was a smart place to start.

Undyne vowed to confront the human who had killed Papyrus and the others, while Sans suppressed his grief and asked Alphys about the Underground’s cameras. The chapter ended with Sans asking whether the snowy region was under surveillance, his magic surging ominously.

• Alphys urged Undyne to evacuate and save the monsters, but Undyne refused and vowed to kill the human.
• Undyne tried to comfort Sans, who brushed her hand away as his magic and fighting spirit surged.
• Undyne left the Laboratory after promising to avenge Papyrus.
• Sans asked Alphys whether cameras covered the Underground, including the snowy region.

Sans relived the nightmare of Papyrus dying and lost control of his magic until Papyrus woke him and calmed him. When Papyrus suggested that Sans sleep beside him and the human, Sans reacted with renewed anger and jealousy.

• Sans’s nightmare triggered blue flames, floating furniture, and uncontrolled bones throughout the living room.
• Papyrus woke and held Sans’s head, calling to him until Sans recognized him and his magic settled.
• Sans broke down in tears as Papyrus comforted him and noticed his burned clothes and exhaustion.
• Papyrus offered to let Sans sleep with him and the human, but Sans’s eyes reignited as he asked whether Papyrus planned to sleep with that kid.

After sleepless nights haunted by visions of a human destroying the Underground, Sans stayed close to Papyrus and resolved to protect him. Papyrus discovered Sans had kept watch all night and embraced him, but Sans ruined the moment with a whoopee cushion prank.

• Papyrus told Sans how his friendship with the human began and asked him to read his favorite bedtime story.
• Sans read Papyrus a story, then stayed by his door as he steeled himself to attack the human and protect Papyrus.
• Papyrus woke to find Sans exhausted and realized he had stayed up to guard him.
• Papyrus hugged Sans and insisted that he should be the one protecting his older brother.
• Sans set off a whoopee cushion in his jacket, and Papyrus angrily called him the worst person ever.

Sans and Papyrus said goodbye to the human, who promised to visit, while Sans remained exhausted from staying up all night. When Papyrus tried to talk about Sans's troubling dreams, Sans remembered seeing Papyrus killed by the human in Alphys's Laboratory and revealed the depth of his hatred for the child.

• Papyrus served the human spaghetti, and he interpreted the food they spat out spelling "I'll visit" as a promise to return.
• Papyrus and the human said goodbye at the border between Snowdin and Waterfall, and Sans invited the human to meet him at Grillby's during his lunch break.
• After the human left, Papyrus asked Sans about his recurring dream and offered to share the burden of protecting him.
• Sans remembered seeing the human slash Papyrus in Alphys's Laboratory, killing him as Papyrus reached out in trust.
• Sans recalled hating the human so deeply that he had wept, then burned away his tears with blue flames.

Sans told Papyrus about memories of a nightmare in which monsters died and Sans saw his own death. After Papyrus comforted him, Sans slept peacefully, then took the human to Grillby's, where he noticed two figures who looked like him.

• Sans described his nightmare memories to Papyrus, including Undyne fighting the human and the monsters facing extinction.
• Papyrus held Sans and reassured him that everyone was safe, calming his unstable magic.
• Papyrus carried Sans around while loudly declaring him his beloved big sister, and Sans fell asleep on his back.
• Sans woke without more nightmares, then found the human in Waterfall and took them to Grillby's by shortcut.
• At Grillby's, Sans heard people call him another Sans and the third Sans, and spotted two figures who looked like him.

Sans took a human child to Grillby’s and asked whether they had killed everyone before. After the child admitted it, Murder attacked and destroyed them, then explained that he and Killer had come to Snowdin looking for Insanity.

• Sans asked the human child what they wanted to eat and ordered two hamburgers from Grillby.
• Sans questioned the child about whether they had met before and whether the child had killed them all.
• The child admitted to killing everyone, and Murder blasted them into bone dust before Sans could respond.
• Murder apologized to Sans for interrupting his conversation.
• Sans realized that Murder and the black-eyed Killer were alternate versions of himself from other timelines.

Killer revealed that someone had deliberately caused Sans’s nightmares and showed him the human’s Save Panel. At the save screen, Geno discovered that three Sanses had appeared instead of the one she expected, including one with determination greater than the human’s.

• Killer explained that Sans’s nightmares were anomalies someone had deliberately made him notice.
• Killer transported Sans and Murder into darkness and showed them the Save Panel the human used to control the timeline.
• Geno waited at the save screen to ask Sans to help destroy the timeline and protect Papyrus from the human.
• Geno recalled how she repeatedly erased Sans’s memories when he refused to help her destroy the world.
• Geno realized that three Sanses had arrived and sensed that one had more determination than the human.

Geno recognized Murder and Killer as dangerous Sanses who had killed everyone before and attacked them in the save screen. Murder restrained Geno, but Sans returned and faced the hooded Killer as Killer approached him with magic gathering in his hand.

• Geno noticed Murder and Killer had extremely high LV and unleashed a barrage of bones and Shock Waves at them.
• Murder threw Sans away with Gravity Magic while Killer matched Geno’s Shock Waves.
• Murder used a Shortcut to appear behind Geno and trapped her beneath countless Blue Bones, forcing her to stop fighting.
• Killer asked Geno to calm down, but Sans returned and saw Geno restrained beside Murder and Killer.
• Killer walked toward Sans as Sans gathered magic in his hand.

Geno explained how Papyrus’s death led her to inject Determination, kill Frisk, and become trapped in the Save Interface. Killer offered to help her reach a happy ending, but Frisk’s fate remained unsettled as Killer questioned whether the human felt guilty.

• Geno told Sans, Murder, and Killer that Papyrus had died at Frisk’s hands and that she had killed Frisk after taking Determination Serum.
• Geno described how she became trapped in the Save Interface, where her melting and death were suspended.
• Killer offered to help Geno gain a happy ending, and Murder removed the Blue Bones holding her.
• Geno said she no longer needed Frisk and prepared to kill the human, but Murder stopped her before aiming bones at Frisk himself.
• Sans and Killer restrained their counterparts, and Killer asked Frisk whether they felt guilty; Frisk said they would accept death as atonement.

Killer, Sans, and Murder reset the timeline so Killer could stop Chara and take their soul. The reset brought them to the Ruins, where Murder pinned Chara down and Killer pulled out their soul.

• Killer explained that she would reset the timeline, stop the human at the Ruins, and put their soul into Frisk's body.
• Frisk admitted her past wrongdoing and promised not to reset again, and Geno reluctantly agreed to trust her.
• Killer, Sans, and Murder joined hands and reset the timeline to its beginning.
• Chara left the Ruins believing Sans was not waiting for them, but Murder dropped down and pinned them in the snow.
• Killer used determination to pull Chara's soul from their body and summoned the save interface.

Killer, Murder, and Geno watched Frisk complete a pacifist journey, then helped Geno leave the Save Space and reunite with everyone on the surface. Later, Geno vanished in a laboratory explosion and woke in the Anti-Void beside Insanity.

• Killer restored Frisk to their body and Geno sent Frisk and Sans on their way.
• Killer, Murder, and Geno watched Frisk befriend the Underground and break the barrier.
• Murder encouraged Geno to leave the Save Space, and Killer opened a Space-Time Rift for her.
• Geno used pie to survive death and arrived safely on the surface, where she met the other Sanses and Papyrus.
• Geno later disappeared in a laboratory explosion and awoke in the Anti-Void beside the missing Insanity.

Oir hosted the book’s first ASK session with Murder, Killer, and Insanity, answering questions and presenting hypothetical scenarios. The session ended with a scenario in which the trio befriended the Star-Eyed Squad and went on a picnic.

• Oir introduced the ASK session and invited Murder, Killer, and Insanity to answer questions.
• Murder estimated that he had about half of his Bad Karma left, while Oir said they did not know when the story would end.
• Murder and Oir answered questions about possible future events and visiting their home AUs.
• Oir presented a hypothetical scenario in which Murder woke beside Killer after a night together and felt too weak to get up.
• Murder, Killer, and Insanity met Berry, Ink, and Dream, then joined them for a picnic and exchanged contact information.