Robert Sens lives in a degenerate future society. He is an apathetic bureaucrat in a society without values. He finally learns from his foster father that he has already become the victim of a genetic experiment as an egg cell. The latter has separated Robert's hereditary traits of reason, pleasure and aggression and cut up copies of his egg cell. The emotionally cold Robert is left only with reason, but the late side effects cause his cells to deteriorate. To escape the threat of cell death, he sets out to find his genetic brothers.