Demon Slayer: Kimetsu no Yaiba Infinity CastleEpisode 1

Synopsis

After Muzan Kibutsuji ambushes the Demon Slayer headquarters, the surviving Corps members are dragged into the ever-shifting, extradimensional Infinity Castle. Separated and heavily outnumbered, Tanjiro, Nezuko, and the elite Hashira must fight their way through Muzan's most powerful Upper Rank demons