During the war of resistance against Japan in the northeast of Sanjiang City, the CPC underground organization was severely damaged, the latent Deng Zihua underground party members in the pseudo police in the cover of his superiors in Dejiang evacuation. Escape after Yu Dejiang finds a traitor. The Soviet intelligence officer Sarah Riva get in touch with Deng Zihua, Deng Zihua cleverly cover to joint Sarah Riva, and successfully and Sarah Riva connected to the head. The party organizations at a higher level to Sanjiang underground made a "dog plan" task, the purpose is in the Soviet Union under the cooperation of the Japanese military fortress, get Dongning drawings. Deng Zihua bravely sacrificed himself, his enemy's sight away, Sarah Riva will be the important drawings to the Soviet intelligence. In August 9, 1945, the Soviet Red Army across the board China territory to attack the Japanese, the Japanese called "Oriental Maginot Line" Dongning fortress, was the Soviet Red Army destroyed, win the war.