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 came home and discovers his family was slaughtered by a demon. His sister Nezuko is the sole survivor of the incident. She has been transformed into a demon, but still surprisingly shows signs of human emotion and thought. Following an encounter with Giyu Tomioka, the Water Hashira of the Demon Slayer Corps, Tanjiro is recruited and send to Giyu's retired master Sakonji Urokodaki for training to also become a Demon Slayer. He begins his quest to help Nezuko turn into a human again.