A depressed housewife, Eve White (Joanne Woodward), is brought by her husband (David Wayne) to consult a psychiatrist (Lee J. Cobb) because her behavior has been strange. Although she denies it, she has purchased uncharacteristically seductive clothing and has been singing and dancing in bars.
Her surprised doctor is soon confronted with a different but equally inadequate personality, the sexy Eve Black. He recognizes the case as an example of the rare condition, multiple personality disorder, and embarks on a course of psychotherapy in search of the woman's missing memories.
Eve's unhealthy marriage disintegrates when she chooses to remain in therapy rather than move away with her violent husband. Psychotherapy helps her to the repressed memory of an instance of childhood abuse: being forced by her mother to kiss the corpse of a dead relative. A third personality, that of intelligent, insightful Jane, slowly emerges to replace the other two. Jane establishes a new life with a loving man.
