“Careful, the doors are closing, the next station is Sokolniki.” Dear passengers, when leaving the train, do not forget your things,” a pleasant male voice comes from the speaker. He notifies passengers of the Moscow metro and advises them to be more careful. Passengers really wouldn't mind being vigilant, because in one of the carriages at rush hour there is a young but very talented pickpocket, masterfully emptying the pockets of unwary citizens.