《Deep dive》 tells the story of the isolation period. The male protagonist Liang Shuo suffered amnesia during a loyalty test task conducted by the Japanese and fell into danger. In order to regain his identity, he went to the dragon's den alone and dealt with the Japanese., No. 76, and the military command, and finally recovered his identity and position with the help of the party, rekindled his faith, and worked with his comrades to smash the huge Japanese conspiracy.