Carrie and Terrie are a pair of identical twins who are polar opposites. During their adolescence, Carrie was a good student and always well behaved, while Terrie was a bad girl with an insatiable sexual appetite and a habit of seducing her sister's boyfriends. The sisters are separated in youth following the tragic death of their parents. Carrie grows up to marry an abusive louse and is trapped in a sexless relationship, but her problems are about to be compounded when her wicked sister arrives in town, intent on exploiting her physical similarity to her sister to avenge herself for past wrongs. Even the help of a private detective may not be enough for Carrie when Terrie becomes allied with Carrie's own husband.
