The crew of an experimental underwater nuclear base are forced to struggle for their lives when their explorations disturb a creature who threatens to destroy their base.
Playing around with a Ouija board, a trio of friends succeeds in contacting the spirit of a young boy. Trouble begins when the evil spirit, Malfeitor, takes over one of their bodies.
Unaware that it's plagued by a host of supernatural phenomena, a mother and her daughter, still reeling from a car crash which claimed the life of Roger Cobb, move into the hold family homestead to start a new life.
Aliens in human disguise commandeer a rural airport during a snowstorm. To survive, the people trapped inside must determine which of their own is not of this Earth.
