During the Taisho Period in Japan, Tanjiro, a benevolent charcoal vendor, experiences the loss of his family to a demon attack. Adding to the tragedy, his sister Nezuko, who is the lone survivor, has also turned into a demon. Despite the overwhelming sorrow, Tanjiro is determined to restore his sister back to her human form and seek revenge against the demon responsible by becoming a "demon slayer." Please note that while the first episode is a completely original anime, episodes 2-7 are a reworked version of the film that includes novel scenes and music.