A completely gripping thriller full of dark family secrets and packed with suspense. For fans of Jane Harper.There is a place in Minnesota with hundreds of miles of glacial lakes and untouched forests called the Boundary Waters. Ten years ago a man and his son trekked into this wilderness and never returned. Until now.Lucas Blackthorn is nineteen, semi-feral, and now incarcerated in Congdon Psychiatric Institute after committing a violent assault. The police are desperate to hear his story; all Lucas wants is to return to the Boundary Waters, and his father.Therapist Maya Stark is tasked with preparing Lucas to face the world's questions. Maya has her own unfinished business with the Boundary Waters and, as she and Lucas grow closer, she sees a chance for them to help each other. She is prepared to risk everything to reunite him with his father and get answers to the questions that have haunted her all her adult life. But sometimes finding the truth is the worst thing you can do...