Major of the Foreign Intelligence Service, special agent Valery Kolchin unexpectedly receives information that professional terrorists are preparing a terrorist attack on the territory of Russia, wild in its cruelty, next to which all past crimes of the militants pale. Soon he becomes aware of the main perpetrator of this monstrous action, a certain former officer of the Russian army, and now a criminal authority nicknamed Stern. The leadership of the FSB understands that the lives of tens of thousands of innocent people are at stake, but there is no time to involve regular units in the operation. Will a group of counterintelligence officers led by Kolchin be able to prevent an unheard-of crime?..