Roy Cowan, a disgraced Solar Guard captain, breaks out of prison and, with two henchman, hijacks a space freighter to use as bait to destroy his old adversaries on board the Polaris.
A blackballed Solar Guard links up with a weapons specialist recently dismissed from the Space Academy to wreak havoc on the solar system's merchant shipping. Tom and his men are assigned to serve as bait to lure the renegades into a trap.
Tom and his pals attempt to rescue a pair of cadets trapped by a deadly beam.