On a locked ward in the world's highest-security prison hospital, a scream shatters the night. The next morning, a nurse's body is found and her daughter has been taken. Forensic profiler Dr Connie Woolwine is renowned for her ability to get inside the mind of a murderer. Now, she must go deep undercover among the most deranged and dangerous men on earth and use her unique skills to find the girl - before it's too late. A claustrophobic, haunting crime thriller that will keep you up at night.