Having been taunted as a child by her older brother Dan about a sleep demon that erases body parts while one sleeps, Kara continues to sleep under the covers as an adult. When Dan brings up “Eraser Man” and laughs about how much that used to terrify her, Kara relives those stressful days, to her fiancee Mark's dismay.

Only the demon isn't just a made up monster. After finding an ugly little idol on a dig, Kara discovers that people she knows are dying or being maimed by some intruder in their bedrooms at night. Only her courage to confront the entity from her worst nightmares can possibly stop it from killing those she loves.