The play tells the story of Yelv Yee and Xu Liuxin in a series of cases in constantly examine the search for the truth story. In 1948, the people's liberation army launched the first city liaoshenzhanyi, individual liberation. Chenzhou City is one of them. But the Kuomintang latent spy, skirmishers, incorrigible thief bandits and other multiple haze to Chenzhou City in without a fight chaos dilemma, confusion and depression full corner of the big city. The original underground party members Qin Tianming to make up the vitality under the new regime, heavy mass challenge, took over as director of Chenzhou City junguanhui. Qin Tianming lead director of investigation Ji Liancai, defend director Sun Dahu and foreign returned to the investigation consultant Yelu Qi launched a reborn transformation work. Yelu Qi to the new regime has been holding skeptical, even though it was a private detective expert, has been the spirit of a day monk hit day clock attitude and martial law cadres at all levels to always keep a distance. But he inspired by the Communists new peers, under the influence of models has finally become a a strong warrior, play their own reasoning skills, unraveling the layers of depth, under the leadership of the operations and colleagues help, finally crushed the latent spy assassination attempt of the central leaders of the conspiracy.