Nineteen-year-old Annie Taylor has a dark story to tell, one of sex, betrayal, and homicide: her family's story.

Ten years ago, her beautiful and well-loved mother disappeared. Her father, a famous sex therapist and loving husband, was charged with the murder.

But Annie stubbornly believes in her father's innocence. She follows in his footsteps and studies psychology, desperate to understand the tragic event that has shaped her life and to exonerate the man she believes was wrongly convicted.

Annie, who will fight for the truth no matter what it reveals, starts discovering more sinister details about her family's history. Why did her peace-loving mother have a police record? Who could explain her father's fear of mirrors? What about the other woman in her father's past, who is also missing? And what about her father's warning to others of a darkness that is hidden inside each of us?

The Girl on Mill Street asks us to explore how much we really know about our own families and how our assumptions can keep us from the truth.