It is 1979 and Albertine, 10, and all her family members have gathered in Brittany to celebrate the birthday of her grandmother. Everyone thinks that the Skylab space station from NASA will fall on their heads this summer. The meeting turns into a crazy weekend full of revelations, love and song.

Marion and Jack try to rekindle their relationship with a visit to Paris, home of Marion's parents — and several of her ex-boyfriends.

On holiday in the south of France, chic Parisian sophisticate Violette meets life-loving IT geek Jean-René. Against all odds, there’s a real chemistry between them and at the end of the summer, Jean-René wastes no time in joining his beloved in Paris. But there’s trouble in paradise, and a third party swiftly appears to shatter the couple’s idyll: Lolo, Violette’s ultra-possessive 19-year-old son, who is determined to get rid of his mother’s lover, whatever it takes…

Marion and Mingus both come from failed relationships but, by bringing their children together, they've managed to form a small yet happy family. Tensions in their household soon begin to spike when Marion's jovial father shows up on their doorstep with his randy daughter and her peculiar boyfriend in tow. As the motor-mouthed houseguests shatter every taboo imaginable, the happy couple begin to question their commitment.