It’s 1986 and a group of grad students are close to discovering what happens to the human brain after staying awake for 200 hours, but something goes terribly wrong with a test subject. After their department is shut down, the team moves forward in secret – only this time on themselves.

Kate Bowman (Jocelin Donahue) is an average social worker who is investigating in the mysterious deaths of people who died in their sleep. Shortly before their deaths, the victims all reported a supernatural force that appeared to them while they were suffering from sleep-paralysis. When Kate investigates further into the case, she opens herself up to the creature’s wrath, and soon finds herself, and her family suffering from an ancient evil.