One year after her sister Melanie mysteriously disappeared, Clover and her friends head into the remote valley where she vanished in search of answers. In an abandoned visitor's centre, they find themselves stalked by a masked killer and horrifically murdered one by one... only to wake up back at the beginning of the same evening. Trapped in the valley, they're forced to relive the nightmare again and again - only each time the killer threat is different, each more terrifying than the last. Every night holds a clue and every death brings them closer to the truth. Hope fading, the group soon realises that they have a limited number of deaths, and the only way to escape is to survive until dawn.
