Tanjiro Kamado is a kind-hearted and intelligent boy who lives with his family in the mountains. After his father's death, he became his family's breadwinner and travels to the nearby village to sell charcoal. One day, Tanjiro comes home to discover his family was slaughtered by a demon. His sister Nezuko is the sole survivor of the incident; though she has been transformed into a demon, Nezuko still shows signs of human emotion and thought. Following an encounter with Giyu Tomioka, the Water Hashira of the Demon Slayer Corps, Tanjiro is sent to train with Giyu's former instructor Sakonji Urokodaki in becoming a Demon Slayer and begins his quest to help Nezuko turn into a human again.