In the early years of the Republic of China, the bronze lion of Yingcheng National Treasure was stolen, and Liu Chun and Li Lang were ordered to arrest the cultural relics dealer Meng Fanping. Liu Chun and Li Lang were wronged and expelled from the police force, and the two were wronged and decided to return to Yingcheng to arrest Meng Fanping, a cultural relics dealer. In order to succeed in the transaction of national treasures, Meng Fanping changed his name and surname and absconded back to Yingcheng, so a story of chasing and recovering began. After several twists and turns, Liu Chun and Li Lang found out that Master Zhang, who sold flatbread, was Meng Fanping, and the two began to arrest, and Meng Fanping and his gang escaped again. Li Lang began to arrest Meng Fanping alone, and after several twists and turns, he finally arrested Meng Fanping, dug out the sub-director of the police station, and gave the society a clean and fair.