The Space Star Silver Streak has been seized by the tyrannical Captain Edmonds, a power-hungry despot who has declared martial law and suspended the Congressional Council. All those who oppose him have been marooned on the barren planet Asturias II.

But Captain Richard Cameron is back...and he's mad! With Frank Johnson, Jack Hasta, and Philippe Stargazer, Cameron sets sail aboard the Hyron Galactic Cruiser Odyssey to take back his ship!

But the task is not easy. Edmonds has laid traps in his path. There are members of the crew loyal to Edmonds. And the Hyron commander Mordrax, still sworn to Cameron's destruction, trails the Odyssey with his formidable Hyron Dreadnought Invincible!