A security robot sub-contraccted out on jobs guarding things like survey missions on a remote planets has managed to free itself from its own governor unit and spends most of its time watching entertainment channels and tolerating the demands of its humans until things start happening that suggest his humans are about to be killed for reasons unknown and despite its general distaste for people it grudgingly decides it likes at least some of them and tries to save them. Action and excitement ensues. Fun sci-fi thriller with a cool sarcastic voice.