One of a lawyer's identical twin daughters is kidnapped. The kidnapper contacts him and demands ransom money. The team's investigation, however, reveals that he doesn't really want the money, but both girls.
The disappearance of an undercover officer in relation to a triple murder puts the BAU on the hunt of a possible serial killer who's turned it into a profession.
The apparent death by Satanic ritual brings the BAU to a small town, and the profiling morphs into a search when it's learned that a teenage girl is missing.