Barbara Hershey is being repeatedly violated by a invisible evil spirit. But is the widowed mother under consistent demonic assault, or is it all in her subconscious? Director Sidney J Furie's above-average supernatural thriller has a literate script by genre writer Frank De Felitta from his own novel. Horror aficionados may be disappointed by the lack of Exorcist-style special effects, but a tense, fearful atmosphere is maintained precisely because of this creative choice. Hershey adds her own special magic to a complex chiller.

A single mom is raped by an invisible force. Her psychiatrist believes the experience stems from childhood trauma, while she knows something supernatural is at play.