Dream No Evil is a 1970 American horror film written and directed by John Hayes, and starring Edmond O'Brien, Brooke Mills, and Marc Lawrence.

Its plot follows a young woman who, adopted and raised by a traveling evangelist group, develops a deadly obsession with locating her birth father.

[1] Grace MacDonald is orphaned by her parents and adopted as a child by a traveling Evangelist church in California who performs entertainment acts as part of their proselytizing.

The Reverend's brother, Patrick Bundy, a Los Angeles medical student engaged to Grace, lives his life separate from the church, though he remains committed to her.

Believing the Reverend's murder may have been only a dream, she returns to the barn, but her fears are confirmed when she finds his bloodied corpse buried under straw.

The Reverend's body is subsequently discovered by authorities, and Patrick directs the sheriff, Mike Pender, to the farm where Grace told him she is staying.

Authorities eventually arrive, and a detective explains Grace's dissociative psychosis to Patrick and Shirley: Her father was in fact a figment of her imagination, and she herself committed all of the murders.