, in the Roaring Twenties. Philip Bang, a notorious master con man serving his time in prison, is relocated to a high security facility for hard labor after causing an uproar at supper. This, however, is actually part of a plan to spring him from prison, arranged with the aid of his former wife and partner, Belle Duke, and his daughter, Charlotte. But on his way to a transit prison facility, as Bang prepares to vacate the train via a wagon restroom, he suddenly finds himself the unwilling escape aide of another con man, young Italian "Felix", who leaves Bang in the soup. But before Felix can enjoy his new-found freedom, he is picked up by Belle Duke's men, who mistake him for Bang. Once his true identity is found out, Belle Duke is less than delighted at his presence and demands of him to free Bang. When Felix manages to escape her thugs, Belle Duke uses Charlotte to set him up, leaving him no alternative than to agree to her request. Using his own experiences with the transit facility, a purloined priest's cassock and a cuckoo clock bomb, Felix breaks Bang out, but Bang proves reluctant to return to Belle Duke, since he had fleeced her of her wealth before going to prison, and for that reason Belle is likely wanting to see the return of her money and revenge exacted on him. After testing Felix's talents and attitude, they become partners, joined by Charlotte, who has fallen in love with Felix. In order to fool Belle Duke once again, Bang decides to use the money he and Felix have appropriated to buy a worthless piece of swampland, arranging a fake archeological sensation and an alleged black market scheme to convince Belle Duke to purchase it at an astronomical price. The plan works out splendidly, but Felix decides to raise the stakes of the game by claiming that he has kidnapped Charlotte, using Bang's sincere distress to fully convince Belle Duke of the "veracity" of their con scheme. Felix makes a run from Belle's men with the money, but supposedly dies when his escape boat crashes into a boathouse and explodes. Shortly afterwards, the police, called upon the scene by Felix as part of his plan, arrives, supposedly arresting a dismayed Bang. But once again a double bluff is played as the police squad turns out to be Bang's con gang, and an unexpected motorcycle escort to be Felix in command of a few shop-window mannequins. After convincing Bang with some effort that his kidnapping sham was actually meant to throw off their opposition, Felix, Bang and Charlotte narrowly escape Belle Duke, who has since discovered the deception, via single-engine airplane. And as a final point, Felix cannot resist one last bluff when he accidentally spills the fleeced 100 millionFrancs out of the plane's open door, only to reel them back in, with each bill meticulously tied to a long line...
