Tanjiro Kamado, driven by the brutal killing of his family by a demon, joined an organisation dedicated to hunting them down, the Demon Slayer Corps. He must balance his thirst for revenge with his need to protect his sister, who was turned into a demon in the same attack that slew his family. Alongside his comrades and fellow corps members Zenitsu Agatsuma and Inosuke Hashibira, Tanjiro has proved his strength time and time again as he is pitted against the demons that plague his world. His journey has found him fighting alongside the Demon Slayer Corps' highest-ranking swordsmen, the Hashira, including Flame Hashira Kyojuro Rengolu aboard the Mugen Train, Sound Hashira Tengen Uzui within the Entertainment District, as well as Mist Hashira Muichiro Tokito and Love Hashira Mitsuri Kanroji at the Swordsmith Village.
In preparation for the final confrontation with the ruler of the demons Muza Kibutsuji, the Demon Slayer Corps embark upon a strict training regime known as the Hashira Training. When Muza Kibutsuji appears at the Demon Slayer headquarters at the Ubuyashiki Mansion, Tanjiro and the Hashira waste no time in confronting their foe, only to spring the trap that the demon has laid. Plunged deep into the demons' stronghold, the Infinity Castle, Tanjiro and the Demon Slayer Corps must now fight for their lives across a mind-bending labyrinth filled with powerful enemies and hidden dangers.
The stage is set as the final battle between the Demon Slayer Corps and the demons ignites.