Waiting for the last customer to leave, the crew of a local supermarket can’t wait to call it a day. Today, it is young Cass’ first day as a store manager and she wants everything to be in order, nevertheless, things will take a turn for the worse as a slight intercom problem together with a sudden power outage will lead to a much more serious trouble. Without a doubt, there’s a killer among them and he wants blood. But where is he hiding?