Up to now, the Seibt family - producers of baby articles - has stood for respectability and traditional family values. This reputation comes under attack when the CEO is found murdered, along with his wife and mistress. Marie Brand is suspicious of the couple's children. Hanno has always hated his father, and Antonia's husband, a close associate of her father, had been afraid of losing his job. In spite of the family's efforts to foil the investigation, Marie persists without relent.