Unhappy in their relationship, Yann and Elsa leave their respective spouses to settle down together in friendship, of course... At 35, the two best friends find themselves in a roommate. A pleasant return to the past? Yes, the even weeks. Because on the odd weeks... their kids show up. Between their newfound celibacy and their family friendship, Yann and Elsa hope to find the perfect balance. But can you really be a family between friends?