The city of Yerevan. School named after Dzerzhinsky. The guys are working on a section of the construction of auxiliary corps. Pioneers work for milling machine, cutting construction materials - tuff. The girls washed the windows. Frunze. The guys from the archaeological expedition of the Palace of pioneers exploring historical monuments in the valley Alaarginskom: tombs, rock carvings. The meeting of the club of young geographers. There is discussion. Guys are trying to uncover the mystery of sunken Atlantis. 428 Moscow school. Guys make dolls. Rehearsal puppet clique. Performance starts. The audience applauded.