COUP DE CHANCE is about the important role chance and luck play in our lives. Fanny and Jean have everything, they are the ideal couple: fulfilled in their professional lives, they live in a magnificent apartment in the high-end districts of Paris and seem to be as in love as the first day they met. But when Fanny crosses, by chance, Alain, a former high school friend, she is immediately hooked. They see each other again, and, very quickly, get closer and closer...