Directed by Haruo Sotozaki, Infinity Castle follows on from Demon Slayer season 4. The movie is the first of an upcoming trilogy based on the Infinity Castle arc from the Demon Slayer: Kimetsu no Yaiba manga, and follows Tanjiro Kamado as he takes on an Upper Rank demon Akaza, in a bid to save the head of the Corps.

Adapting the Infinity Castle manga arc, the new anime movie sees shonen protagonist Tanjiro dive headfirst into the belly of the beast – the titular Infinity Castle, where a legion of demons (led by series Big Bad Muzan Kibutsuji) lies in wait.