All Imogene Scott knows of her mother is the bedtime story her father told her as a child. It’s the story of how her parents met: he, a forensic pathologist, she, a mysterious woman who came to identify a body. A woman who left Imogene and her father when Imogene was a baby, a woman who was always possessed by a powerful loneliness, a woman who many referred to as “troubled waters.” Now Imogene is seventeen, and her father, a famous author of medical mysteries, has struck out in the middle of the night and hasn’t come back. Neither Imogene’s stepmother nor the police know where he could’ve gone, but Imogene is convinced he’s looking for her mother. And she decides it’s up to her to put to use the skills she’s gleaned from a lifetime of reading her father’s books to track down a woman she’s only known in stories in order to find him and, perhaps, the answer to the question she’s carried with her for her entire life.