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. Rossi receives a visit from a woman who could hold a secret from his past.

The BAU searches Tallahassee for a serial killer who calls the authorities to report the crimes prior to committing murder. Also, as Rossi prepares for a weekend visit with his daughter, Joy, he receives startling news about the death of a comrade in Vietnam.

The BAU helps Rossi’s journalist daughter, Joy, investigate the disappearance of a college student. Also, the team is alarmed when Giuseppe Montolo dies in prison after he warns Morgan about the “Dirty Dozen,” an underground group of hitmen, and JJ returns from maternity leave.

Wedding bells are ringing as Rossi prepares to marry Krystall. But first, the BAU team travels to Los Angeles to investigate a series of fatal shootings in broad daylight following car accidents.