In a near-future society where family lineage dictates destiny, a profound discovery shatters one man's understanding of his own identity. Raiz? Ichikawa stars as Kaito, a seemingly ordinary man who learns he is the genetically engineered "second son" of a powerful and secretive dynasty, a backup heir created solely as a living organ repository for his ailing older brother. Guided by the enigmatic Dr. Saito, played by Michiko Saga, and pursued by the family's ruthless enforcer Ry?suke Kagawa, Kaito is thrust into a hidden world of corporate espionage and bio-technological conspiracy. As he uncovers the chilling truth behind his existence, he must confront the moral dilemma of his predetermined fate while evading those who see him as mere property. This gripping sci-fi thriller from director Mitsuo Hirotsu weaves a tense narrative of rebellion and self-discovery, exploring the dark consequences of playing god with human life and the fierce struggle to claim one's own soul in a world that sees you as a spare part.