With its Christmas lights and dusting of snow, Kingston Falls is an idyllic small town—until the gremlins take over. A father returns from Chinatown with an unusual pet, a Mogwai—a gift for his son. The rules are simple: Keep your Mogwai away from water, bright lights and, most importantly, never…never…feed him after midnight. But the rules are inadvertently broken, and the consequences multiply at an alarming rate.