Can the essence of evil invade our world through a simple Ouija board? In New York City, a sixteen-year-old girl named Alice has become possessed by demons. Alice's father, Dr. O'Doyle, calls in Ken Darby, a psychiatrist, who suspects that Alice may be in the early stages of a mental disorder. Alice's grandmother knows better, and calls in her parish priest, Father Robert. While the entire family and Ken band together to try to help Alice, the demon...