Spotted after he microfilms secret U.S. Navy documents, foreign agent Rattick is killed when he tries to make a getaway. Naval Intelligence officer Captain Wright and Operative Dale are assigned to investigate and determine who is behind the spy syndicate for which Rattick worked. They bring in the services of Agent Tom Norman, who bears a strong resemblance to Rattick.

"Fighting Spies and Saboteurs...To Pierce a Curtain of Death on a Raging Sea!"