When Detective Nick Fourcade enters the home of Genevieve Gauthier outside the sleepy town of Bayou Breaux, Louisiana, the bloody crime scene that awaits him is both the most brutal and the most confusing he's ever seen. Genevieve's seven-year-old son, P.J., has been murdered by an alleged intruder, yet Genevieve is alive and well, a witness inexplicably left behind to tell the tale. There is no evidence of forced entry, not a clue that points to a motive. Meanwhile, Nick's wife, Detective Annie Broussard, sits in the emergency room with the grieving Genevieve. A mother herself, Annie understands the emotional devastation this woman is going through, but as a detective she's troubled by a story that makes little sense. Who would murder a child and leave the only witness behind?