Ah Zheng (played by Nick Cheung) is naturally gifted and cunning, but unfortunately he did not use his God-given talent to do something, but used tricks with Ah Jing (played by Chin Ka Lok), a small gangster in the market, to cheat for food and drink in the arena. However, by chance, their deception triggered a series of bad consequences: Ah Jing's master was killed, the business of Mr. Kong, the boss of the money bank, was completely destroyed, and his daughter became the oiran of the brothel. At the same time, because Ah Jing revealed that Ah Lin (played by Jessica Hsuan), the young master of the local notary office, who was known as the "No. 1 Tooth in the World", was actually a daughter, he was forced to marry Ah Lin in order to preserve the reputation of the notary office and preside over the overall situation. Ah Zheng, the former Jianghu old con man, turned into the head of the notary office who presided over justice. At the beginning, the change of role made him very uncomfortable. But with the help of Ah Jing and Ah Lin, Ah Zheng, with his intelligence and years of accumulated experience in the arena, exposed a series of old cons and crimes, and as they got along for a long time, he developed a true relationship with Ah Lin...