Guillaume has made it: A machine that can clean dirty air by simply sucking all dirt into air balloons and then shipping them far far away so his explanation. Some Japanese business guys, after dinner with a lot of alcohol, order 5,000 pieces. His only problem: His production capacity is way to small so he gets to produce the machines in his private house. His wife Bernadette is far from being happy about it. Her private life goes down the line so she decides to leave Guillaume and to finally have revenge she candidates for major against her husband...

Ten years after the French political upheavals of 1968, a maturing "soixante-huitard" falls in with some young radicals who are influenced by a book he had written. But does he still have the guts to translate his ideas into acts against the state? And is he still attractive to younger chicks?

Antoine is a musician. The forties, he suddenly decides to end his career. After a few days of wandering, he gets a job as a janitor. Mathilde lives in the old building in the east of Paris where he takes office. This is a young retiree, generous and involved, who divides his time between his associational activities and the life of the condominium. One night, she discovers a disturbing crack on the wall of his living room. Gradually, his anxiety grew to turn into panic and if the building collapsed ... Slowly, Antoine befriends the woman he feared to see slip into madness. Between slips and concerns, both form an awkward tandem, humorous and solidarity which will, perhaps, through this bad patch.