In Bern, the body of a woman is discovered with a mysterious symbol carved by the killer on her chest. But she is not his only victim. Dutch profiler Maarten S. Schneider and BKA commissioner Sabina Nemes launch a hunt for the criminal—though it seems the killer is always one step ahead.
Meanwhile, a young specialist in psychology, Hanna, arrives at “Stein-feld,” a prison for offenders with mental disorders. She must conduct group therapy sessions. But she is interested in just one prisoner—Piet van Loon. Long ago, Snyder put him behind bars. So both experienced investigators and an aspiring psychologist find themselves pulled into a diabolical game with no winner.