In the not-too-distant future, the world is engulfed by nuclear war. Giant piloted humanoid robots, called Mechs, engage in constant battle between U.N. forces and the Axis of Asia. Leo, a 29-year-old outlaw with a mysterious metal implant in the back of his head, was born into this war but doesn't mind it-long as it continues to draw government attention away from his own criminal activities. Unsure of his origins, the young scrapper has made a life working for the Tijuana Cartel. When he is captured by U.N. forces, that life is suddenly tossed into complete chaos as he discovers the conspiracies surrounding his past; conspiracies that will leave him and all of Earth transformed forever. Leo will have to fight to ensure that transformation leads to Earth's salvation, or our planet's destruction will be imminent.