Leon and Ursula have grown up in a family who are the definition of 'different'. Mother is an obsessive-compulsive and Father is a strict disciplinarian and doctor who uses an anatomically correct medical dummy named 'Pin' to teach life lessons to his children. Ursula soon matures enough to realise from where Pin's personality springs. Leon, though, is more willing to believe the fantasy. He becomes obsessed with Pin, considering him, perhaps more than his father, part of their family. Pin takes over Leon's decisions, his personality and eventually his mind. When a horrific accident completely unhinges the children's way of life, it seems there is a single survivor... Pin. And now he wants a family of his own.