Two secret lovers drive to a Holiday Inn in Amana, Iowa in 1980. They are Roger Atkison, a married man, and Rose Berkert, his mistress. They have planned a weekend far from home to be together. They check into their motel and order room service. The next morning, they fail to check out so the maid alerts the manager and he opens their room door. What he finds is something straight out of a horror film. The small motel room is painted with blood and Roger and Rose are hacked to pieces. Who committed this horrific act and why?