Armed groups are trying to destabilize the situation in the region in order to disrupt the Sochi Olympics. Their plan is to destroy a checkpoint, seize hostages in a hospital, and hijack an airplane. However, their way is blocked by Captain Andrei Lushin—an resolute and observant officer capable of quickly finding the right way out. Suspecting something is amiss, he orders changes to the routes of passage through the minefield around the checkpoint. And he is right: a secret traitor, bought by the militants, passes them a diagram of the mine barriers—without knowing that the information on it has already been replaced. Lushin understands that access to such maps is available to only a handful of people. That means the fight will have to be waged not only against the enemy outside, but also against the one hiding nearby…