Space Resources, Inc. (SRI) mines asteroids for the riches a populated Earth needs without degrading the planet. Yet there are those opposed to progress in whatever its form such as the Gaia Alliance, a front group for eco-terrorists. During a violent attack on the Moon, the terrorists steal an exploration ship, arm it, and rename it the Rock Killer. Charlene "Charlie" Jones of SRI security is trying to infiltrate the Gaia Alliance's cabal to find evidence linking them to the murder of her fiancé. But a run-in with the law threatens to reveal her identity to the dangerous men of the Alliance. Simultaneously, SRI Director Alexander Chun is traveling to the asteroid belt to bring a kilometer-long nickel-iron rock back to Earth orbit to mine for its valuable metals. Following him and his multi-national team is the Rock Killer. Without armaments, millions of miles from help, Chun must stop those who threaten him and the lives of his crew.