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. With her, he will confront the sins and sadness of his own past, including the betrayal of his long suffering wife and his involvement in the death of her sister, a patient who he drove mad. And in so doing, he will find that sadness is the greatest pleasure there is!