Anthony (Arnaud Ducret) is a happy bachelor who enjoys his single life very much. He spends all day with his cohabiting friend Thomas (Nicolas Ullman) in the joy of playing and drinking. Anthony has never thought about getting married, let alone taking on the responsibility of being a father. Thomas moved away for some reason, and Anthony's next roommate is a woman named Jenny (Louise Bourgoin). Jenny's outstanding appearance and cheerful personality quickly attracted Anthony's attention, making him fall madly in love. What Anthony didn't expect was that Jenny was already the mother of two children. In this way, in order to win Jenny's heart, Anthony had to start learning how to live with these two "little monsters" under the same roof.