Like many children, Ryou Tanabe dreams of becoming a hero, but possessing the ability to interact with spirits leads to uncontrollable outbursts. During a school trip, Ryou unknowingly attacks a classmate while possessed by a fox spirit, resulting in bullying and shattered ambitions. However, an anonymous email presents Ryou with a chance to redeem himself and achieve his dream in a post-apocalyptic world where he discovers the deceased soul of his sister, Yuka Nishizono. Despite their complicated relationship, the siblings team up to uncover the cause of the world's dystopian state.
