At long last, the Hyron commander Mordrax has triumphed. Captain Richard Cameron is taken prisoner aboard Mordrax's Galactic Cruiser Stendar and brought to the planet Hyron for public execution.

But at the moment of execution, Cameron is rescued by a band of revolutionaries, desperate freedom fighters who recruit Cameron's help in overthrowing the power-hungry despot who has seized the throne of Hyron.

Meanwhile, Cameron's own ship, the Silver Streak, has been taken over by a despot of its own. And though forbidden to attempt any rescue of Cameron, nothing will stop Frank Johnson, Jack Hasta, and Philippe Stargazer from doing all they can to help their old friend-even if it means disobeying the Congressional Council, defying the new captain, and turning fugitive!