The screenplay was written by Max W. Kimmich, Hermann Oberländer and Hans Martin Cremer after the 1932 novel of the same title by Curt J. Braun.

Werner Dux, heir to "Dux-Werke", a major maker of cars and motorcycles, is a gambler who has just been arrested in Chicago for shooting a cardsharper.

In jail he learns that his father has died, leaving Dux-Werke without a leader, given that Werner's cousin and co-heiress Steffie is still too young to run the firm.

He even organizes an endurance test for motorcycles via Konstantinopel, Rome and Barcelona, which results in a big Turkish order for the company.

When the real Werner escapes from jail and arrives in Germany needing money, he persuades Michael to stay in place and hand over all profits of the firm to him.

Foreign-language versions were also produced for Italy (L´evaso di Chicago), Greece (O asotos yios) and Czechoslovakia (Uprchlik z Chicaga).