Ever since his father's death, the responsibility of supporting the family has rested on Tanjirou Kamado's shoulders. Although the Kamado family lives in poverty on a remote mountain, they manage to enjoy a relatively peaceful and happy existence. One day, Tanjirou decides to travel to the nearby village to earn some money by selling charcoal. On his return journey, night falls, forcing him to seek shelter in the home of a strange man who warns him about flesh-eating demons that lurk in the woods at night. When he finally arrives home the next day, he is confronted with a horrifying scene: his entire family has been slaughtered. Even worse, the only survivor is his sister Nezuko, who has been transformed into a bloodthirsty demon. Driven by rage and hatred, Tanjirou vows to avenge his family and remain by the side of his only remaining sibling. Together with the mysterious group known as the Demon Slayer Corps, Tanjirou will do whatever it takes to slay the demons and protect the remnants of his beloved sister's humanity.