Leningrad plant "Pyrometer". Photos of the exhibition hall of the plant, revealing the history of its formation. Pre-war aircraft measuring instruments. Modern navigation devices for aviation and ships, tape recorders manufactured by the plant. Workshop of machine tools with numerical control. The workers are working. Profile-grinding section of the shop, processing of the part through a magnifying glass, laser welding of the part, hardening of the part by spraying hard alloys. Winding workshop, printed circuit board workshop, galvanization area. Labor veterans of the plant. Factory dynasty of the Aleshin family. Meeting of veterans of the Great Patriotic War with veterans of the war in Afghanistan. Newsreel. Military operations on the territory of Afghanistan. Director of the Pyrometer plant A. G. Pshenichnikov (voice-over). The city of Leningrad: streets, public transport, Peter and Paul Fortress, Lebyazhya Kanavka, Engineering Castle.