It's ten p.m. on the night before Walnut Lake's neighborhood supermarket closes its doors forever. The owners and night crew have a long shift ahead of them. Even longer than they think. Ace check-out girl, Jennifer, has a deranged ex-boyfriend who's fresh out of prison. When he appears outside, weird things start happening. The phone lines are cut, and the night crew starts dying one by one, in the most gruesome ways imaginable. But is it the ex-boyfriend or someone, or something, else?