Demon Slayer follows 13-year-old Tanjiro Kamado as his world is turned upside down. When he returns home one morning to find his entire family murdered save for his sister Nezuko—who has turned into a demon. Determined to avenge their deaths and find a cure that would transform Nezuko back into a human, Tanjiro sets out on a journey to train for the Demon Slayer Corps. The story follows him as he joins this underground organization of skilled fighters who dedicate their lives to protecting humans from the vicious creatures.