A young couple moves into a farmhouse in rural Pennsylvania. What they don't know is that there is an unseen presence in the house, and that it wants to take possession of the wife.
A commercial-jet captain (Chuck Connors) has ghosts on board from stones of an English abbey being shipped overseas.
A murder witness can't convince the police that the killer lives in the apartment across the courtyard from him, and he realizes he is the sniper's next victim.