A year after her sister Melanie’s mysterious disappearance, Klodge and her friends travel to the remote valley where her sister vanished in search of answers. They find themselves murdered and wake up to find themselves back at the beginning of that night. Trapped in the valley, they are forced to relive the nightmare again and again—each time, the killer’s threat is different, each time more terrifying than the last, and the only way to escape is to survive…until dawn.