When victims with large social media followings are found dead in Maryland, the BAU searches for an UnSub taking on the persona of an Internet urban legend. Meanwhile, Morgan and Savannah struggle to find quality time for each other with their busy careers.

The BAU investigates random murders in northern Virginia and searches for a conflicted UnSub who has an uncontrollable urge to kill but is also filled with remorse. Meanwhile, Rossi receives a visit from a woman who could hold a secret from his past.