Seven year-old old twin brothers, separated during the Civil War in Tajikistan, face each other years later in a new war where one is an American soldier and the other is Taliban.

An elite team of FBI profilers analyze the country's most twisted criminal minds, anticipating their next moves before they strike again. The Behavioral Analysis Unit's most experienced agent is David Rossi, a founding member of the BAU who returns to help the team solve new cases.