As Nezuko slowly becomes a demon, Tanjiro sets out to find a cure for her and become a demon slayer so he can avenge his family.
When Tanjiro Kamado returns home to find his family was attacked and killed by demons, he discovers his younger sister Nezuko was the only survivor. As Nezuko slowly becomes a demon, Tanjiro sets out to find a cure for her and become a demon slayer so he can avenge his family.