A do gooder hopes to cure potential romantic partners of what he considers the disease of love, by putting them up in a property and having them watched over.Things do not turn out according to his plan.

At the end of the last century, in the Cévennes, a valiant officer was taken for a brigand. Brought to defend himself, he kills one of his attackers and seeks refuge in caves where he hides and from which he no longer dares to come out. The devotion of a doctor saves him and he marries the daughter of this one.

A burglar, Bob Duchemin, is charged with murder following a mysterious settling of accounts. Suspicion also falls on the manager of a cabaret on the Champs-Elysées, as well as the owner of the establishment, Enrico. But Bob is also found guilty and sentenced to twenty years' hard labor. Soon abandoned by his fiancée, Lili, Bob learns that she has become Enrico's mistress, one of the attractions at the Tipico. The young singer's affair quickly makes her an international star. For his part, Bob escapes and seeks revenge. He meets a young pure freak who dissuades him from carrying out his murder plans. Bob kills Enrico anyway, but in self-defense. Afterwards, having been found innocent, he will be able to "remake his life" with the pure young girl.

The inhabitants of a small provincial town are requisitioned to take part in the French army's major maneuvers. A foreign spy takes advantage of these maneuvers to steal secret documents. The pursuit and capture of the spy and his accomplices are successfully carried out by all those taking part in the maneuvers.