Ken, a member of the marauding group from the planet Varna known as the Wolf Attackers, and particularly feared for his combat prowess as 'Star Wolf', becomes a hunted traitor after shooting his comrades to save a mother and child.

An alien is pursued as a traitor by his own race because he refuses to kill humans.

In this second film compiled from episodes of a Japanese TV serial, Captain Joe, reformed interstellar marauder Ken and the rest of the crew of the Bacchus-III set off to destroy an alien race's super-weapon.