Beautiful Rebecca Mason has had trouble sleeping, and after reading about the therapy offered by Dr Helmut Hammer, decides to visit him. But Dr Hammer's treatment is highly unconventional. He tells her he believes all such problems are sexual, and in order to achieve a cure she must agree to a programme of treatment at his country house. Rebecca agrees, and is immediately plunged into a world of domination, sadism and strict bondage and submission, and is astonished to find that her role as a sex slave gives her sexual satisfaction that she has never experienced before. However, Rebecca must pass a number of obedience tests for her new master and his male and female friends before her treatment is complete and she feels the real benefits of her Submission Therapy...