A secret agent is summoned by the head of a counter espionage organization, to Trieste where he is to unmask a potential enemy operating in Venice.
Jean-Pierre Aumont , Carla Del Poggio , Fernand Ledoux , Marcel Herrand , Nicolas Vogel , Roldano Lupi , Attilio Dottesio , Gianni Rizzo , John Kitzmiller , Louis de Funès
