On Christmas Eve, a homeless family breaks into a rest stop run by a devout elderly couple and their granddaughter, murders them, and impersonates the owners to start operating the rest stop. One day, Ji-ho, the daughter of a conglomerate, on a trip with her parents before her wedding, her parents are murdered by strangers, and Ji-ho barely survives but becomes paralyzed from the waist down. For Ji-ho, who is suffering from the aftereffects of psychological shock, her fiancé Kyung-soo (played by Jae-hee) suggests taking a trip to a secluded place, and Kyung-soo's group sets off on a trip on the weekend. Late at night on the journey, they accidentally stop at a rest stop run by the homeless family… At that rest stop, that night, the ugly truth of humanity is revealed, and the terrifying curse of Satan brought by human wickedness begins...