À trois, on y va

Micha and Charlotte are a couple who have recently bought a house near Lille. For the past few months, the two slowly drift apart and Charlotte starts cheating on Micha with their mutual friend Mélodie who works as a lawyer. Little does Charlotte know, Micha also starts cheating on her with the same person, Mélodie. Mélodie ends up falling in love with both of them while she becomes the secret lover of both Micha and Charlotte.