Gambling in Shanghai was rampant in the old days of the Republic of China and the society was in decline.Qingyue (played by Wei Haishan) was chased by Lan Zi (played by Yuan Zhongfang), one of the four kings, to the No. 41 Casino. The magician who was performing on the stage rescued him and escaped.Later, Qingyue learned that the magician was actually He Chongqian, the king of Southern Gambling, so she learned from him that he was diligent in the Thousand Arts.At that time, Lan Zi learned from the Japanese secret service that she was a Japanese person from the Japanese secret service. She poisoned Simulang (played by Hai Junjie) in the name of curing the disease by using the medicine given to her by the Japanese secret service. Simulang had become a puppet.In order to disintegrate the Shanghai gambling world, Qingyue searched Simulang for many times but failed, and was misunderstood by Simulang as a traitor.Lan Zi gave Qingyue a war letter. This is a bet that no one can turn over if they lose!There are casino experts fighting inside, Japanese spies siege outside, and love-hate entanglement between the kings of the north and the south. What will the final outcome look like?