During World War II, gangster Lucky Jordan is drafted and sent to a training base near his New York City office.

After sneaking back into his headquarters, Jordan learns from disloyal underling Slip that the two men he encountered outside the base were after the briefcase Jill discarded.

Jordan tracks the spy ring to a botanical preserve on Long Island, where he finds Slip and a traitor named Kilpatrick holding the papers.

The preserve's exits are immediately locked, but Jordan hides the papers and an explanatory note inside a man's umbrella.

The guard instead connects her to Kilpatrick, who deceives her by masquerading as a government agent, causing her to unwittingly assist in Jordan's capture.

Herr Kesselman, the spy ring's chief, oversees an interrogation of Jordan, who is threatened with torture and quickly invents a story about the location of the papers.

[6] In a contemporary review for The New York Times, critic Howard Thompson wrote: "[Ladd's] portrayal of Lucky Jordan will not disappoint, though the film leaves one wishing that Paramount had provided a worthier screen play, particularly since this is his first starring vehicle.