Victor, an eight-year-old boy, finds himself at the head of a large fortune after the death of his father, Philippe. Hélène, his mother, is courted by Roland, a distant cousin who tries to resuscitate a passion lived ten years earlier. Victor is worried, especially since Roland has taken Sandrine, a pretty brunette with him, whose child discovers the affair with Roland. When he takes the head of the family business managed by Philippe, Victor gets scared.