Radio officer Kendall discovers seaman Carlson sending unauthorized messages. Carlson is killed, and Kendall flees ashore, meeting Carlson's sister Nedra, part of a sabotage ring. Nedra seeks help as both saboteurs pursue Kendall.

American Steve Kendall, a freighter's radio officer, discovers seaman Carlson sending an unauthorized message ashore as the ship approaches his war-poised homeland. Carlson is shot in cold blood when he jumps ship and Kendall, implicated in the espionage, swims ashore to avoid arrest. A woman he meets at the dock hides him in her apartment, where he learns Carlson was her brother, and they both work in a sabotage ring. Nedra is a singer at Tio's Cafe, and she approaches Tio for help when both the saboteurs and the secret police try to capture Steve.—Sister Grimm <[email protected]>

Nearing the harbor of an unnamed European port, radioman Steve Kendall, sends a message requesting a port-pilot for the ship. Carlson, a crewman, pulls a gun and makes Steve send a mysterious message. Wilson, the ship's second-mate kills Carlson and takes over the ship, revealing himself as a secret agent of the country, and places Steve under arrest as an accomplice of Carlson. Steve jumps overboard, escapes, makes the shore and meets a mysterious girl, Nedra, who takes him to her room where she tells him she is Carlson's sister and a member of an organization plotting to overthrow the tyrant dictator of the country. She plans to help Steve get out of the country but when she reports to her superior, he, after she leaves, orders a henchman, Gair, to get rid of Steve. He overcomes Gair, and Nedro takes him to the café where she is a singer and introduces him to Tio, who turns out to be a man named Edwards who was Steve's football coach in the United States. More duplicity and many complications follow.—Les Adams <[email protected]>