For more than twenty years, Ella has learned to live without her mother, Maggie, who disappeared into a fog of mental illness when Ella turned ten. Despite this trauma, Ella has forged ahead, becoming a veterinarian, getting married, and most of all, developing a deep, trusting bond with her father, John, a ferry captain in Seattle. Ella's contented life is shattered when her father is hit by a car and killed. Going through his papers, she learns that her father maintained a secret relationship with her mother. The unsettling questions raised by her father's death and her mother's unexpected reappearance sends Ella on a journey to discover the truth about the woman who abandoned her and the man who raised her, a journey that threatens her marriage, her unborn child, and ultimately, her sanity.