Kagaya Ubuyashiki, Head of the Demon Slayer Corps, visits a graveyard where the deceased Demon Slayer warriors are buried with the help of his wife Amane. Lamenting about those who gave their lives in the continuous war against demon king Muzan Kibutsuji and his army, he declares that the human spirit will always rise to the challenge. Tanjiro Kamado, his demonic younger sister Nezuko, and his friends Zenitsu Agatsuma and Inosuke Hashibira board the Mugen Train[N 1] to assist the Flame Hashira Kyojuro Rengoku in his mission to hunt for a demon that has caused 40 people to go missing. Soon after boarding, they are attacked by two demons which Kyojuro quickly kills. Directly after, all of them except for Nezuko fall into a deep sleep, the work of Enmu, Lower One of the Twelve Kizuki.