Alvez and Tyler team up to investigate the murder of an FBI training instructor, while the rest of the BAU explore ways to lure out The Fan.

The BAU investigates a string of brutal police officer executions in a border town. Could the killings be cartel-related or something far more personal? The rabbit hole goes deeper when it's discovered that the department may be harboring dark secrets of their own. Behind prison walls, Voit receives an enigmatic visitor, one who may not be what they seem.