The adventurer Gino Gadari is looking for a new challenge when he run into the soave Liane Serano. She tells him about her uncle, the banker Alberto Dorna who has fallen into the clutches of a well known card-cheat and impostor. Gadari has found his new game. To bring the greatest crook of the century, Aristide Trasymopolus, down.—Ulf Kjell Gür