The Kill Lock unified four criminals in a quest to escape their seemingly inevitable, linked deaths. They managed to escape destruction by merging their consciousnesses, and now one of the smartest-and most malicious-bots in the universe has an unbreakable body and a planet at his command. Homeworld won’t allow it, and so two of the deadliest assassins in the universe are tasked to kill the Artisan Wraith.

Each found guilty of an irredeemable crime, four robots find themselves banished from their home world and bound together by the Kill Lock—a programming link that means if one of them dies, they all will. Now a soldier, an addict, a murderer, and a child find themselves forced to protect each other while in search of a cure to survive.