Demon Slayer: Kimetsu no Yaiba – The Movie: Infinity Castle shows the Demon Slayer Corps facing their most dangerous enemy, Muzan Kibutsuji, the King of Demons. After Muzan attacks, the slayers are trapped inside the Infinity Castle, a huge place that keeps changing like a maze. Inside, the Hashira and other slayers fight powerful Upper Rank demons. Zenitsu fights Kaigaku, who betrayed their master, while Shinobu faces Doma, the demon who killed her sister. Tanjiro and Giyu battle Akaza, whose sad past is revealed.
The movie is directed by Haruo Sotozaki, based on the manga by Koyoharu Gotouge, and produced by Ufotable.