This analysis of a thirty-year-old woman presenting a mixture of hysterical and compulsive symptoms traces her neurosis and her asocial behaviour to the trauma of the primal scene. Excluded from a mysterious parental play in which she wished to join she became a spoil-sport, compulsively interfering with other children's play, domineering in every situation when possible, and where she could not dominate secluding herself or acting masochistically. With advancing years her aggression was turned more upon herself, with the development of severe anxieties and hypochondriacal symptoms, but continuing to destroy companionship and affection. Symptoms and asocial behaviour disappeared under analysis.