Alex and his sister run a business designed to break up relationships. They are hired by a rich man to break up the wedding of his daughter. The only problem is that they only have one week to do so.

Diane doesn't hesitate for a moment when her best friends, Thomas and Jacques, ask her to be their surrogate mother. It is in these hardly ideal circumstances that she becomes infatuated with Fabrizio.

Sophie is both attracted to boys and girls. She is torn between Nicolas and Mathilde.