Crunchyroll drops the international trailer for 'Demon Slayer: Infinity Castle,' first in trilogy finale, debuting in U.S. theaters Sept. 12.

When the fourth season of the TV anime came to an end with its adaptation of the Hashira Training Arc, it was announced that the Demon Slayer anime would return not with a new season but instead a full theatrical feature film trilogy adapting the massive Infinity Castle arc from Koyoharu Gotoge’s orginal manga.

At its end, however, the group were ambushed and drawn into the titular Infinity Castle, the HQ for villain Muzan Kibutsuji and his motley crew of fearsome 'Upper Rank' demons. Infinity Castle will be the first of a trilogy of movies, with each adapting the manga arc of the same name and bringing the story to a close.