John Levin, an ex veteran who has since become a bounty hunter, currently resides on the planet Neptune. He is employed by the Kingdom, a supreme power that exerts control over both cyborgs and humans throughout the galaxies. John has been tasked with a mission to travel to Earth, where he must apprehend a rebellious leader and return them to the Neptune planet However, his task will be intricate as he will encounter betrayal and fierce battles.