Betty Davis fans get their money's worth with this film in which she plays a set of identical twins, Kate and Pat Bosworth. Kate is the country mouse ,and Pat is the city mouse. Ms. Davis does a yeoman's job infusing each of the twins with her own personality, so as to make them two entirely distinct persons. Kate, the demure and sensitive artist, falls for Bill Emerson, a lighthouse keeper, played by a young Glenn Ford, while Pat, an amoral man hungry predator, thinks nothing of stealing Bill right out from under her sister's nose.

Pat and Bill end up getting married, because as Bill puts it, Kate is like a cake without the frosting, while Pat makes him think that the cake is fully frosted. Little does Bill know what is in store for him. Trust me, his sweet tooth quickly begins to decay and pain him. Both Bill and Kate end up miserable once Pat and Bill are married, as Pat proceeds to have a series of affairs.

One day, while the twins are out boating, they are caught in a severe storm. When Pat is washed overboard, Kate is knocked unconscious but remains in the boat and is rescued. Upon awakening, she realizes that she has been mistaken for the now dead Pat and decides to continue the charade, as she believes that it is her only chance for happiness with Bill. She soon realizes all is not what it seemed, and she comes to a crossroad in her life, as does Bill.

While the ending of the story is somewhat implausible, it is very Hollywood and wraps the film up into one neat and tidy ending. Notwithstanding this, it is still an entertaining melodrama and a must see by Bette Davis fans, as well as lovers of classic films.