A sadistic serial rapist locks a helpless young hitchhiker in his basement, and by means of humiliation, torture, psychological punishment and starvation, little by little, he breaks her will.
Emanuelle goes undercover into a prison to expose the corrupted officials who are brutalizing the inmates. Emanuelle is shocked by the horrors and humiliation the prisoners are subjected to, but when her true identity is discovered, she finds herself at the receiving end.