Tanjiro Kamado, driven by the determination to restore his sister Nezuko to her human form after she was turned into a demon, joins the Demon Slayer Corps, an organization dedicated to eradicating demons. Throughout his journey, Tanjiro teams up with companions Zenitsu Agatsuma and Inosuke Hashibira, facing various formidable demons while forging strong bonds of friendship and camaraderie. His battles grow increasingly intense as he fights alongside the elite swordsmen of the Corps, known as the Hashira. In the "Mugen Train" arc, he partners with Flame Hashira Kyojuro Rengoku; in the "Entertainment District" arc, he collaborates with Sound Hashira Tengen Uzui; and in the "Swordsmith Village" arc, he joins forces with Mist Hashira Muichiro Tokito and Love Hashira Mitsuri Kanroji. As the Corps prepares for a decisive confrontation against Muzan Kibutsuji, the leader of demons, they undergo rigorous joint training led by the Hashira. However, Muzan unexpectedly infiltrates the Demon Slayer headquarters, the Ubuyashiki Estate, plunging the Corps into chaos. Despite swift efforts by Tanjiro and the Hashira to protect their leader, they find themselves trapped in a mysterious and perilous domain controlled by Muzan.