The film takes place in a mental institution. Young-goon, a young woman who believes herself to be a cyborg, refuses to eat and instead administers electric shocks to herself. Il-soon, a young male patient hospitalized for anti-social behavior and schizophrenia, befriends Young-goon. After Young-goon is given shock treatment, she believes that she has been recharged and fantasizes about killing the hospital staff who had previously taken her mentally-ill grandmother away. In reality, her physical condition begins to deteriorate rapidly. By convincing her that he had installed a food-to-electrical-energy converting unit in her back, Il-soon gets Young-goon to eat.