A burned-out professional sniper finds himself trapped in an all-glass penthouse by a lethal competitor and must find a way to survive and escape with little to no cover between him and the killer.

A sequel to the 1982 horror film "Unhinged". Lorna's sister went missing in 1985 never to be heard from again. Now, Lorna and a team of investigators are about to uncover what happened to her sister.