Tanjiro Kamado joined the Demon Slayer Corps after his sister Nezuko became a demon. Alongside comrades Zenitsu and Inosuke, he`s fought demons and trained with the elite Hashira swordsmen. As the Corps prepares for their final battle through Hashira Training, demon king Muzan Kibutsuji attacks their headquarters. Tanjiro and the Hashira are pulled into the demons` stronghold - the Infinity Castle - where the ultimate battle between Demon Slayers and demons begins.