In 1937, there was no news 20 years after the son of Wang Qi Mei, a large householder in Hubei, Henan and Anhui, was stolen. Police Chief Yan Fei subdued the high-powered Snitch Ryoma and sent Ryoma into the Wang's house pretending to be Wang Qi Mei's son, to spy on Wang Qi Mei for colluding with the Japanese and seduce rape. Unexpectedly, the young master of the Wang family went home at this time, leaving Longma in a crisis. In the fierce competition between the true and false young masters, the truth emerged.