Annabelle has finally made peace with the loss of her beloved husband. Until she finds out he wasn't alone when he died.

Since a plane crash killed her husband two years ago, Annabelle Murphy has found solace in raising her two children. Just when she thinks the grief is behind her, she receives the news that the wreckage of the small plane has been discovered - and that her husband did not die alone. He was with another woman. Suddenly, Annabelle is forced to question everything she once held true.

Sophie Parker knows the woman who was on that plane. A dolphin researcher who has lived a quiet life, Sophie has never let anyone get too close. But when Annabelle shows up on Sophie's doorstep full of painful questions, both women must confront their intertwining pasts - and find the courage to face the truth.