In 1925, Miss Nan O’Dea infiltrated the wealthy, rarefied world of author Agatha Christie and her husband, Archie. In every way, she became a part of their life. Soon, Nan became Archie’s mistress, luring him away from his devoted wife, desperate to marry him. Nan’s plot didn’t begin the day she met Archie and Agatha. It began decades before, in Ireland, when Nan was a young girl. She and the man she loved were a star-crossed couple who were destined to be together --- until the Great War, a pandemic and shameful secrets tore them apart. Then acts of unspeakable cruelty kept them separated. What drives someone to murder? What will someone do in the name of love? What kind of crime can someone never forgive?

Brett had been in love with Charlie from the day she laid eyes on him in college. When Charlie is found murdered, Brett is devastated. But if she is honest with herself, their marriage had been hanging by a thread for quite some time. Though all clues point to Charlie’s brother Eli, who’s been in and out of psychiatric hospitals for years, any number of people might have been driven to slit the throat of Charlie Moss --- a handsome, charismatic man who unwittingly damaged almost every life he touched. Brett is determined to understand how such a tragedy could have happened --- and if she was somehow complicit.