Dennis is a man with a disability who has had nightmares all his life since he was a child, including one where he entered a carnival ride that seemed underwhelming until he is told that "the ride isn't over." As an adult, Dennis has one where a living demon, called the Cadaver, fastens a zipper onto his back and enters his body. He finds a hidden room in the cellar that holds a mirror that Dennis believes the Cadaver came from. He begins speaking to his reflection, who seems to answer back to him.