Intruder

It's 10pm. The night before Walnut Lake's neighborhood supermarket closes its doors forever. The owners and night crew have a long shift ahead of them… longer than they think! Ace check-out girl, Jennifer (Renee Estevez), 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. An ex-cop is trying to find out who the killer is and what possessed him to start the bloody rampage. But is it the ex-boyfriend or is it someone else? (official distributor synopsis)