Follow the Butterfly by Martta Kaukonen

'We all have our secrets...' Renowned therapist Clarissa Virtanen is not afraid to look at 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. Secrets which drive her to kill. And kill again. Somehow, Clarissa must find the key to unlock her past. So she makes a bargain with Ida - six months to try and stop her taking her own life. But what if she has entered a game more deadly, and more evil, than she could ever imagine?