The plot is dedicated to the Moscow schoolgirl K. Lycheva, who was awarded the Samantha Smith Prize, established by the US organization "Children as Peacemakers". American schoolgirl S. Smith with a book at the table; talks with the pioneers of the Artek camp. Soviet journalist working in the United States, V. Dunaev talks about K. Lycheva's trip to the United States (synchronously). Katya Lycheva plays the piano at a school for the children of Soviet diplomats in Washington. American schoolgirl Star Row talks to Katya (synchronously in English). Katya is dancing with US schoolchildren. K. Lycheva talks about a trip to the United States in the Moscow Palace of Pioneers and Schoolchildren, shows a poster with signatures in defense of peace on earth, plays with her friends in the yard. Press conference of K. Lycheva in the Soviet Peace Committee: journalists, schoolchildren ask Katya questions; among those present is Katya's mother. Katya Lycheva watches the festive demonstration of workers from the guest rostrum on Red Square.