Quand le restaurant familial menace de fermer, deux cousins bretons relâchent des rats pour s’improviser dératiseurs. Le même été, deux jeunes femmes trafiquent le concours de beauté local pour promouvoir leurs bijoux. Embarqués dans leurs stratagèmes chaotiques, ces quatre débrouillards en quête d’avenir finissent par se percuter.

Rose and Jean have nothing in common. Rose is a force of nature who faces all her problems with a disarming joie de vivre. She lives with her 3 children upstairs in the family hotel that no longer belongs to her. They're not poor, they're broke... but only temporarily. Jean is a solitary, taciturn man who has buried his big heart under layers of modesty and resignation. When he arrives in this unusual family, however, he quickly becomes indispensable. What did they expect before they met? Probably nothing. He soon becomes indispensable.

Alex, 43, is not a man of many responsibilities. He works as a tow truck driver in the car repair garage run with an iron fist by his mother Antoinette. She hopes he will someday take over the business, but Alex manages to consistently prove that he’s not up to the task. One day, he assists a woman whose car broke down and ends up spending the night at her place. The next morning, she is nowhere to be found, and Alex discovers he is alone... with three kids!