Secret agent FX-18 goes undercover to break up an espionage ring.
Without knowing it, Johnny, a young rock musician, finds himself involved with a Parisian drug gang. Realising he is being set up, he throws the drugs into the Seine and takes refuge in the Camargue with his family and his fiancée, Gigi. Meanwhile, the dealers are hot on their heels.
A gang of young tugs led by Frankie, opens a nightclub just in front of a gangster's hideout. Morelli is his name and he prepares the stealing of the century.
