Action detective series "Snow and Ashes" takes place during the Great Patriotic War, in 1942. A large group of Soviet troops is surrounded. The NKVD received information that the enemy is preparing a breakthrough, and provides assistance in the preparation of the saboteur, who is in the rear. To expose the traitor on the scene sent an experienced employee of the NKVD Major Urusov. But the saboteur is tricky and dangerous opponent: removing witnesses, he continues to help the Germans to prepare the attack. Urusov have to make every effort to expose the enemy ...