Children sleep at night in the kindergarten bedroom. Voice-over text provides information for children about what kind of work is done in the city at night while the children are sleeping. Technological process for the production of bread in the workshop of one of the bakery. Production processes in the shops of one of the printing houses. Finished printed products. Repair of tram tracks at night. Washing of city transport: buses, trolleybuses. Children ride a carousel. Children wake up in the kindergarten room in the morning.