A family is attacked by demons and only two members survive - Tanjiro and his sister Nezuko, who is turning into a demon slowly. Tanjiro sets out to become a demon slayer to avenge his family and cure his sister.
When three gifted kids at an isolated idyllic orphanage discover the secret and sinister purpose they were raised for, they look for a way to escape from their evil caretaker and lead the other children in a risky escape plan.