Dr. Henry Jekyll believes that there are two distinct sides to men - a good and an evil side. He believes that by separating the two, man can become liberated. He succeeds in his experiments with chemicals to accomplish this and transforms into Hyde to commit horrendous crimes. When he discontinues use of the drug, it is already too late.
Aspiring young Scottish politician John Shand enters into an unusual agreement with the wealthy Wylie family -- if they fund his education, he must marry their daughter, Maggie. Staying true to his word, John weds Maggie and begins a successful career, thanks largely to his savvy wife. The couple's relationship is placed in jeopardy when John faces temptation in the form of the lovely aristocrat Lady Sybil Tenterden.
Eve Marley (Aileen Pringle)is forced to marry a wealthy jeweler that she does not love in order to save the man she loves, Rupert Endon (Ian Keith), from being unjustly arrested as a thief. Rupert, unaware of the reason his sweetheart married his rival, goes to the Far East where he grows rich after discovering a diamond mine. He breaks Eve's husband by underselling him and then returns to England to exact his revenge on the woman he thinks did him wrong.
