The restless sales representative of a transport company Joanna Mills travels from Saint Louis to Texas in a business trip. She is haunted by violent visions and after meeting her client, she visits her lonely father. On the next morning, she decides to visit La Salle, a small town where she has never been before, but she had recollections of many locations. She lodges in a hotel and later she meets and is befriended by the local widower Terry Stahl, who helps her from an aggression. Her daydreams and nightmares increase and she becomes obsessed for disclosing the truth about her visions of a brutal murder of a woman in a barn. Along her investigation, Joanna gets close to the killer and feels that her life is in danger.