Nothing led one to believe that Magalie and Guillaume's paths could cross. But that's what happens when Monique and André, Magalie's mother and William's father, newly in love, organize a dinner party to which their offspring are invited. Guillaume falls in love with Magalie, this unexpected "half-sister". Magalie is in a relationship, but Guillaume wants to see her again so badly that he entrusts her with the project of renovating the kitchen of his suburban bungalow. A relationship as ambiguous as it is sincere develops between them, but will Magalie be ready to accept Guillaume's love?