Throughout Dr. Ivy's life, a dark fantasy has tested his limits of self-control. Finally ready to cross the threshold of reality, the allure of exploiting sedated patients claims him. As satisfying as the experience turns out, it fails to cure a lonely heart. Realizing he requires more than a warm body, the doctor revisits an abandoned idea. Working on numerous formulas, he discovers that the right mix of nitrous oxide will make his dream come true...