'Original, intelligent and intriguing' Andrea Mara, author of All Her Fault 'Tricks the reader time and again' KMVCan she cure a killer?Renowned therapist Clarissa Virtanen isn't afraid to explore the darkest side of humanity.Haunted by the death of a young patient, she will do whatever it takes to save the most vulnerable. But when Ida - angry, damaged and seemingly suicidal - walks into her office, Clarissa may have met her match.For Ida has secrets. Murderous secrets, which mark her like a bloodstain. Somehow, Clarissa must find the key to unlock Ida's past.So she makes a bargain with her - six months to stop Ida taking her own life.But what if she has entered a game more deadly, and more evil, than she could ever imagine?