A year has passed since Melanie, Clover's sister, disappeared under mysterious circumstances. To find answers, she sets out on a search with her friends. While exploring an abandoned center, they encounter a masked killer. One by one, their friends die, but they wake up at the beginning of the same evening and relive everything again. Stuck in a time loop, the friends are forced to experience the nightmare over and over. With each repetition, the threat becomes more terrifying. Hope fades, and they realize that their only chance of survival is to make it through until dawn.