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.
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.
A man with a hook for a hand escapes from a mental institution to go after the children of his previous victims.
