When Billy (Zach Galligan) breaks the cardinal rules for the keeping of his rare new pet — no water, no food after midnight and no bright light — chaos is unleashed in his idyllic small town. What was once cute and fuzzy-wuzzy transforms and multiplies into a horde of dangerous, mayhem-loving creatures. With Hoyt Axton, Phoebe Cates, Dick Miller, Corey Feldman and Glynn Turman.