Places of worship are being targeted. At each location, two religious items are taken and a note left in their place. Those notes and the vague descriptions of the thief are the only clues Lieutenant Jake Stalb and the Special Crimes Task Force have to conduct their investigation until the suspect leaves a riddle hinting at his true identity. The case becomes more complicated when a teenager copies the suspect's sketches, citizens file false reports, and the task force recovers the criminal's DNA and fingerprints from a crime scene. There's just one problem with the forensic evidence. Both of those things are traced back to a dead man. Jake and his team must follow every lead in their attempt to track down and capture the mysterious Skull Man before he decides to kill one of his victims, harms someone who gets in his way, or the city is torn apart by his twisted war plans to destroy all religions.