Alex, a campus security guard working the night shift, hears strange noises and then strange things start happening that grow increasingly sinister in nature. He finds a cryptic message scrawled in blood-but whose blood? And who is behind it all? In a building that is supposed to be empty at night except for security, Alex realizes he is not alone. Leo has him isolated and trapped. Armed with an unusual weapon forged just to torture and kill Alex, Leo closes in. He has set an intricate trap with shocking surprises for Alex along the way. Alex finds that the quick-witted Leo seems to have anticipated his every move. He manages to escape repeatedly, but the relentless Leo has all night to kill.