The theft of a fortune in diamonds and the attempt by soldier of fortune Johnny Dent to outwit his pursuers who would stop at nothing to get their hands on the treasure forms the story-line. The chase reaches across the continent as Dent eludes the diamond syndicate police, a ruthless gangster, and a scheming girl in his attempt to escape.

An American adventurer who has a gambling den in Istanbul, who is suspected to be involved in the kidnapping of a nuclear scientist, but ultimately becomes self on the search for the disappeared and gets a striving for world domination secret organization.