Flame Hashira Kyojuro Rengoku is tasked with finding an elusive demon plaguing a town, believing it may also be connected to numerous disappearances on the Mugen Train. He meets a pair of bento vendors and advises them on the risk of demons, before he soon locates the Mugen Train. After learning it is slated to be put back into service, he encounters the demon responsible for the attacks throughout the area. To spite him for his humanity, the demon decides to hunt down the bento vendors. Kyojuro
Tanjiro, Zenitsu, and Inosuke meet Kyojuro on the train. After an explanation of the situation by the Hashira, they discover two demons hidden on board and witness Kyojuro's impressive abilities first hand. Into the night, all four Demon Slayers fall asleep, with Tanjiro dreaming about being reunited with his lost family. In actuality, they have fallen into the Blood Demon Art of Lower Rank One Enmu; the demon had mixed his blood into the ink of their tickets, allowing his plan to go into motion
Whilst the Demon Slayers are asleep, Enmu instructs four recruited passengers to tie their wrists to theirs, fall asleep, and enter their dreams. Armed with an awl made of his bone, they must search for their spiritual core and destroy it to incapacitate them. Kyojuro's intruder finds his core, but his intensely strong spirit manages to stop her in the real world. Nezuko, who is unaffected by Enmu's Blood Demon Art, emerges from her box and tries to wake up Tanjiro. She alerts him that he is ins
Tanjiro's intruder enters his subconsciousness, but finds himself unwilling to destroy his spiritual core. Tanjiro awakens to find his peers asleep. Nezuko burns the ropes on their wrists, which awakens the intruders. They attack Tanjiro, who knocks them out; he spares his intruder after learning how sick and desperate he was. When Zenitsu and Inosuke fail to awaken, Tanjiro climbs onto the roof to confront Enmu. Despite the demon repeatedly forcing him into unconsciousness, Tanjiro overcomes th
Inosuke and Tanjiro fight Enmu from inside the train but find their attacks futile. Nezuko joins the fight but is nearly overwhelmed until Zenitsu's intervention. Kyojuro damages Enmu enough to stall his assault and explains his plan to Tanjiro; he himself, Zenitsu, and Nezuko will protect the passengers while he and Inosuke will search for Enmu's neck. They locate it at the train's locomotive, but Enmu continues to generate flesh as protection. The driver, wanting to protect him, stabs Tanjiro
After the train derails, Enmu disintegrates. Tanjiro struggles with his wound but manages to stabilize it under Kyojuro's guidance. They are then confronted by Upper Rank Three Akaza, who tries to persuade Kyojuro into turning into a demon, having sensed how powerful he was. Appealing to his integrity as the Flame Hashira, he vehemently refuses, causing Akaza to attack him. He orders Tanjiro and Inosuke to stay behind. Despite Kyojuro's tremendous strength and speed, Akaza overwhelms him with hi
Making a last stand, Kyojuro unleashes one final attack on Akaza, but the demon mortally wounds him and flees upon the arrival of daybreak. A desperate Tanjiro hurls his sword at Akaza, who nonetheless escapes as he angrily denounces him as a coward for fleeing. As Kyojuro succumbs to his injuries, he confides in Tanjiro messages for both his brother and father for him to give them. He accepts Nezuko as a member of the Demon Slayer Corps and encourages Tanjiro to "set his heart ablaze". He sees