Florence, a lawyer overwhelmed by her family life, decides to buy a humanoid robot with a perfect physique. The robot meets all her expectations: maintain the house, take care of the children, and more... By maliciously disrupting their daily routine, the robot also arouses the jealousy of her self-centered careless husband, Franck, a second-class actor who suddenly realizes he must make some efforts not to lose the love of his wife.

Everything goes for the best in Fanny's life without stories ... until she discovers that her beloved son, Arthur, nine, is the scapegoat of three boys at his school. Fanny will not leave her son alone in front of these little executioners: she will give these dirty kids the change of their room. Thunderstorms and playground traps, now it will be "an eye for an eye and a tooth for a tooth!"