In 1952, Eve White is a timid, self-effacing wife and mother who has severe and blinding headaches and occasional blackouts. Eventually she is sent to see a personality psychiatry Dr. Luther, and while having a conversation, a "new personality", the wild, fun-loving Eve Black, emerges. Eve Black knows everything about Eve White, but Eve White is unaware of Eve Black. Eve White is sent to a hospital for observation after Eve Black tries to kill Eve White's daughter, Bonnie. When Eve is released, her husband finds a job in another state and leaves her in a boarding house, while Bonnie lives with Eve's parents. When Eve White's husband returns, he tells her that he doesn't believe she has multiple personalities and tries to take her back to Jacksonville, Florida with him but she feels she isn't well enough to leave and is afraid Eve Black will try to harm Bonnie again and refuses to go. The stress of the situation causes Eve Black to assert and she confronts Eve White's husband at his hotel where he not only realizes Eve Black is real, but also she convinces him to take her to Jacksonville. When Eve Black goes out dancing with another man, Ralph slaps her when she returns to the hotel and ends up divorcing Eve White.