The CIA and their European partners plan coups d'etat in Greece, Turkey and Italy and stage a terror attack in Milano. French engineer Laffitte and his family are caught in the mayhem, and he tries to find the conspirators single-handedly.
On the French Riviera vengeful Laffitte and East-German agent Winnie separately locate the secret hideout of the conspirators, combine their forces, extract compromising information from the safe and publish the crimes of the arms dealers.