Cadet Happy is ordered to "meet and greet" two new cadets who are the scions of prominent members of the government. He takes an immediate interest in pretty Joan "Jo" Vance, but Ferris Macklin, the son of the governor of Triton, immediately expresses his discontent with being forced to join the Space Patrol. Their relationship is further strained when Macklin blames Happy for taking Corry's space cruiser through a meteor belt causing a crash landing when he, in fact, disobeyed Happy's orders concerning their course.
A transportation company's ships being robbed regularly, but only when they are carrying large amounts of money and credits. Commander Corey suspects that the ship's captain is stealing the money from his own ships and blaming a mysterious gang of space pirates to cover his tracks. Corey orders Happy to stow away on the spaceship and await developments, not realizing that the crooked captain has an informant working in Space Patrol's secret code section and passing along crucial information to the criminals.