After she’s run off the road, an expectant mother barely survives a harrowing crash. When she awakens days later, she discovers that her baby has been taken.

Shortly after David Abbott moves into his new San Francisco digs, he has an unwelcome visitor on his hands: winsome Elizabeth Martinson, who asserts that the apartment is hers — and promptly vanishes. When she starts appearing and disappearing at will, David thinks she’s a ghost, while Elizabeth is convinced she’s alive.