To her husband Annie O' Neill is the perfect wife & mother. To the man who adores her she's an unattainable ideal. To her rival she is an obsession. Dr. Olivia Simon is on duty in the emergency room of North Carolina's Outer Banks Hospital when a gunshot victim is brought in. Midway through the desperate effort to save the young woman's life Olivia realizes who she is-Annie O' Neill. The woman Olivia's husband Paul is in love with. When Annie dies on the operating table she leaves behind three other victims. Alec O' Neill who thought he had the perfect marriage. Paul whose fixation on Annie is unshakable. & Olivia who is desperate to understand the woman who destroyed her marriage. Now they are left with unanswered questions about who Annie really was. & about the secrets she kept hidden so well.