A security leak is found at a Southern California atomic plant. The authorities stand in fear that the information leaked would go to a hostile nation. To investigate the case more efficiently, Dan O'Hara, an FBI agent, and Philip Grayson, a Scotland Yard sleuth, join forces. Will they manage to stop the spy ring from achieving their aim?

• Columbia Pictures
• Edward Small Productions
• Louis Hayward
• Dennis O'Keefe
• Louise Allbritton
• Carl Esmond
• Onslow Stevens
• Raymond Burr
• Art Baker
• Lowell Gilmore