Three Girls and A Killer

Three adventurous sisters, being bored, went out like they usually do. Instead of heading to the mall where they usually go, they decided that, since Halloween is tomorrow, they would head off to an abandoned elementary school just for laughs. Equipped with a camera, flashlight, batteries, and weapons to get into locked off rooms. By opening a door to a particular room, they don't know what kind of horrors they've unleashed behind.