Even as the zombie apocalypse rages on, the threats that plagued the lives of heroes do not cease. Sentinels, the colossal, automated mutant hunters are still on the prowl. As the obedient robots that they are, they will hunt whoever they are programmed to, be it the living or the undead, mutant or not. But two can play at this game, as the heroes have captured and reprogrammed a Sentinel of their own!