In a world where parasites create new human races, Elei leads a peaceful life as an aircar driver — until a mysterious attack on his boss sends him fleeing with a bullet in his side and the fleet at his heels.

Pursued for a secret he does not possess, he has but one thought: to stay alive.

Yet his pursuers aren't inclined to sit down and talk, and that's not the end of Elei's troubles. The two powerful parasites inhabiting his body, at a balance until now, choose this moment to bring him down, leaving Elei with no choice but to trust in people he barely knows in a mad race against time.

It won't be long before he realizes he must find out this deadly secret — a secret that might change the fate of his world and everything he has ever known — or die trying.