Unsettling signals are arriving from the fringes of explored space. Rebel robots have developed the ability to cooperate and are using that ability to establish bases on uninhabited planets. Their stated objective: enslave all biological life — what they have taken to calling bags of bones — under Robocracy rule. The Galactic Rangers have been called in to respond, and what they are facing this time is a more capable enemy than before. Upgraded models. Find the Robocracy. Stop it. The simple pleasures of human civilization — kittens, breakfast in bed, the internet, all of it — are depending on the outcome.