《Deep dive》 tells the story of the male protagonist Gong Liang Shuo who lost his memory in a % loyalty test task conducted by the Japanese and fell into danger. In order to find his identity, he went to the tiger's den alone, and was exhausted in the cracks between the Japanese, No. 76, and the Military Control Commission. Later, with the help of the party, he rekindled his faith in his heart, and smashed the Japanese's huge conspiracy with his comrades.