'One woman in triplicate' is the summary of a Psychological Research Project done on Monica and her two sisters at college! As young girls, these identical triplets discover how they can fool anyone as to their identity, and they become little she-devils in doing so. They get away with so-called murder! All three come down simultaneously with acute appendicitis...with exact same white blood counts! This alerts the Psychology Department at their college, and they agree to be researched by a young Psychology Professor. Every facet of their lives are researched in detail. When the research gets around to their sex lives, the three identical she-devils play havoc with the Professor and his Research Project!