A psychiatrist who uses his practice to sexually torment his patients, enters into a dark, sexual underworld with his most depraved patient, a seemingly sweet young woman with a taste for control, fear and pain. with her, he will confront the sins and pain of his own past, including the betrayal of his long-suffering wife and his involvement in the death of her Sis, a patient who he drove mad. And in so doing, he will find that pain is the greatest pleasure there is.