Gideon and the team go to the small town of Golconda, Nevada to help apprehend the man who could be the most prolific serial killer ever. The local authorities want to go in and take action, but Gideon doesn't want to take the chance that the killer will keep another secret from them so he convinces the locals to let him talk to the suspect. While Gideon talks to the man, the rest of the team investigates trying to figure out why the man keeps coming back to the same town year after year. Based on the case of a real serial killer.