in the 1930s, xu congliang, a puppet manchukuo policeman who was outstanding in ability, witty and courage, but without firm belief, won the trust of jin ronggui, the director of the police department, with his outstanding ability to solve the case. on the other hand, out of his admiration for guan haidan, the chief of the criminal section of the police department, helped guan haidan to turn danger into safety again and again, and fought side by side with guan haidan in many actions and grew up to be a real communist party. eee。 in the bloody manchukuo police department, xu congliang has been on the verge of razor, from hostility to cooperation with guan haidan, and then to mutual understanding, and finally won guan haidan's love and gained firm belief.