The film tells about Sergei Yun-Fu, or Sergei Mao, the son of Mao Zedong, and Nikolai Elizarov, or Chiang Ching-guo, the son of Chiang Kai-shek. Both of them grew up, got an education and worked in the USSR. One fought as a tanker in the Soviet Army during the Great Patriotic War, the other was one of the leaders of Uralmash. But the Comintern and the NKVD equally disposed of their Russian destinies. Both were valuable figures in Stalin's game of influence in China and in the bitter struggle for power between the two Chinese dictators. Both returned to China to become companions of their fathers in this struggle. They themselves never met. Sergei died in the Korean War in 1950. Jiang Jingguo became the President of Taiwan.