Slumber is an upcoming American-British supernatural horror film taking on the life of a doctor named Alice. She is going through some struggles in her very own life, when a strange occurrence starts happening to a family she knows. A parasite has been attacking them while they are asleep, and no matter how much she tries, Alice finds it almost impossible to locate the real cause behind the horrific occurring. Her scientific beliefs are questioned as she deduces that some supernatural demonic forces might be at work there. She has to find a solution to the trouble before the situation gets out of hand.