After two years in hiding, a famed space pirate with a "psychogun" for a left arm joins a bounty huntress on a quest to save her world, only to find himself battling an old enemy.

In deep Space, the United Galaxies Federation of Justice set bounties over all kinds of criminals. Cobra is back in action to help bounty-hunter June find her two sisters, and save planet Myras. But Lord Nekron, leader of the Galactic Guild, a powerful criminal organization, is following their track with the same goal .