HUMAN EXPERIMENTS

Rachel Foster is a country singer traveling alone through the USA. She resists the advances of lecherous bar owner Mat Tibbs and, in her hurry to leave town, she accidentally wrecks her car. Looking for assistance, she finds what appears to be an abandoned house—but after stumbling inside the place, she discovers the scene of a grisly multiple homicide perpetrated by a young boy.

As no one believes that the child is responsible for such a horrific act, she is railroaded into a women's correctional facility by the prurient bar owner's brother, Sheriff Tibbs. As well as being falsely charged with the murders, the innocent musician now finds herself at the mercy of prison psychiatrist Dr. Kline, who has diabolical intentions. Kline has some radical techniques for "curing" criminality, and, after a failed escape attempt, she undergoes his 'treatment' and completely loses her mind, whereupon her name is changed to Sarah Jean Walker. Afterward, the warden gets notice that the boy woke up and confessed to killing his whole family. Kline, to keep Rachel under his thumb and to hide his radical therapy methods, tries to have Rachel kill the warden, but Rachel apparently regains her senses and breaks the programming. She shoots up the office and seems to wound Kline. Some time later, Rachel is seen once again singing in a dive bar; however, she now goes by her new name, Sarah Jean Walker.

Rachel undergoes Dr. Kline’s brainwashing and loses her identity, but regains her senses and rebels, ultimately escaping the psychiatrist’s control. She later reappears under a new name, performing in a bar.

The ending underscores the dehumanizing effects of institutional cruelty and psychological manipulation. Rachel’s partial recovery and adoption of a new identity reflect both the trauma she endured and her resilience—she escapes the worst of Dr. Kline’s control but is irrevocably altered, embodying both survival and loss.