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...

In a totalitarian society in a near future, the undercover detective Bob Arctor is working with a small time group of drug users trying to reach the big distributors of a brain-damaging drug called Substance D. His assignment is promoted by the recovery center New Path Corporation, and when Bob begins to lose his own identity and have schizophrenic behavior, he is submitted to tests to check his mental conditions.