When homicide detectives Leo Magozzi and Gino Rolseth are called to a criminal offense scene inside a heavily-wooded town park, the setting is all too familiar. So when they locate a playing credit card around the victim’s body, their most severe fears are confirmed: there’s a serial killer working in the city for the very first time in years. As the assault accelerates in Minneapolis, Magozzi and Rolseth quickly realize their killer is usually planning to comprehensive the deck, plus they enlist Grace MacBride and her unconventional partners at Monkeewrench Software program to help end the rampage. Like a baffling tangle of evidence accumulates, the cops and Monkeewrench make unlikely contacts between a farmer’s lacking little girl, a serial killer, and a decades-old stabbing that bring them face-to-face with pure evil.