France, 1893. Joseph Bouvier attempts to shoot his love who refused to marry him and to commit suicide. Upon release from the filthy asylum where he was placed, with bullets still remaining in his head, he wanders the country roads and rapes and murders many teenagers over years. The judge Rousseau captures him, but to serve his ambition seeks to avoid that Bouvier is simply declared insane.
It is 1654, in the South of France. When horsemen follow a runaway slave into the convent where he's taken sanctuary and kill both the fugitive and the Mother Superior, they little realise that one of the novices is the spirited daughter of retired musketeer D'Artagnan.
In Paris, Lulu, a passionate policeman, works with the faith of a rookie, despite the sclerotic bureaucracy and the incompetence or negligence of some of his colleagues. In his new position as a narcotics inspector, he tries to keep his sanity as he witnesses the worst of the human condition.
