While searching for a missing friend, Clark, Lana, and Chloe make a horrible discovery - an entire family, gruesomely murdered. At the same time, Lex Luthor's tycoon father is violently abducted in broad daylight. The reports of a massacre of international workers in far-off Haiti seem a world away from sleepy Smallville. But then a rash of brazen robberies are committed in the town ...by zombies! A mysterious death near an abandoned missile silo starts Clark searching for a new case of meteor mutation. But even Clark's powers can't reveal the lead-lined underground lab where a scientist's meteor experiments are turning human subjects into murderous monsters. This looks like a job for ...Clark Kent!