Grace McBride and the techs at Monkee Wrench Software have helped the police solve a lot of nasty crimes, but the work has taken its toll on them, and they decide to take a break by taking on a private case involving a missing person. Meanwhile. Detectives Magozi and Rolseth are processing a crime scene in the woods, a body has been found, a playing card prominently displayed. As more bodies are found, the detectives know they have a serial killer on their hands, and they need the help of their friends at Monkee Wrench to crack the case. Grace may not want to get involved in this case, but it soon becomes clear she will have no choice, as her missing person looks to be connected to the string of murders, all stretching back to one brutal killing years earlier.