An old detective does not want to retire. The only way out is to prove to his boss that he still can catch criminals. The problem is that there were no crimes recently to work on. Together with his retired friend he decides to commit a perfect crime himself and then quickly solve it. Real problems start when a real criminal steals money he has stolen.
The beginning of the 30s of the last century. A leak of classified information was found at the Soviet shipbuilding plant. Arriving under the guise of a scientist, the legendary chekist Karotin begins to unravel the threads of the conspiracy of the fascist spy organization. He is helped by inexperienced but active local detectives. Mastering the basics of the counterintelligence, they fall into a situation the other one funnier.
The young dentist Chesnokov has a knack for painlessly removing teeth, much to the dismay of other dentists, who fear unemployment and start to challenge Chesnokov.
