It has been a whole year since Melanie, who is Clover's sister, vanished in a perplexing manner. In order to uncover the truth, she embarks on a quest alongside her companions. During their exploration of an abandoned facility, they come face to face with a masked murderer. As their friends succumb to death one by one, they inexplicably wake up at the start of the same evening and relive the events all over again. Trapped in a never-ending time loop, they are compelled to endure the horrors repeatedly. With each repetition, the danger intensifies, causing their hope to dwindle. They soon realize that their only chance of making it out alive is to survive until dawn.
