A filmmaker holds a series of boundary-pushing auditions for his latest project: a thriller on the subject of female pleasure.

Louise and Blanche run L'Etape, a cafe restaurant in a Savoy village. Facing them is Le Virage, run by Lucie and her daughters. The rivalry between the two cafes will be exacerbated during the truckers' strike that blocks the village.

In 35,000 BC, the tribe of the Dirty Hairs is at war against the tribe of the Clean Hairs for eight hundred years, trying to get their shampoo. The chief of the Dirty Hairs sends his daughter Guy disguised to the enemy tribe to get some shampoo for his tribe. When the healer of the Clean Hairs tribe surprisingly kills two cavemen of his tribe, their imbecile chief assigns Pierre with curled hair and Pierre blonde to investigate the murder and find the criminal.

In 1960s France, 16-year-old Hannah Goldman is experiencing a painful adolescence. Her Jewish background and plain appearance make her an object of ridicule, but she has a talent for music and is determined to fulfil her ambition to play in the school jazz band.