The film DEMON SLAYER: KIMETSU NO YAIBA – INFINITY CASTLE is an anime adaptation of the manga and focuses on the climax of the battle between the Demon Slayer Corps and Muzan Kibutsuji. The main characters, including Tanjiro and Nezuko, venture into the mysterious Infinity Castle to face powerful Upper Rank demons and ultimately Muzan himself. Before that, the Hashira and other demon slayers must defeat the members of the Twelve Kizuki. The main part of the film takes place in the magical Infinity Castle, where battles with elite demons take place. The heroes face powerful demons, including Upper Rank demons who are part of Muzan's army. The film culminates in a battle with Muzan Kibutsuji, the main villain of the series. Before the final confrontation, the Demon Slayer Corps must overcome other obstacles and defeat other demons.