A colonel from the anti-drug department addresses the operatives: their trained spaniels cannot detect the shipments of banned substances that regularly arrive in Moscow from Dushanbe. The informant calls the flight of the plane every time, a team of specialists and dog handlers leave, but there is no result… This time Mukhtar goes to the airport and barks at a passenger with a cat cage. Everyone thinks that the dog just reacted to the cat. But in vain…
 

In the morning, two unknown men attack Artyom at the entrance, take away his phone, official ID and a pistol. Neighbor Svetlana is giving him first aid. Being late for work, he decides not to tell anyone about what happened, but to sort everything out personally. The body of policeman Saveliev is found in one of the courtyards, and next to him is Artyom's mobile phone and ID card. The gun is not there. Svetlana visits Artyom and imperceptibly slips a gun. While his colleagues are forced to search him, Mukhtar skillfully hides the weapon. Lena and Tolik make a plan of action.