In the first year of the Republic of China, the warlords were in power, the situation was turbulent, and all the forces were eager to move, and Jin Sansheng, the big bully of Tongcheng, colluded with the officials and businessmen, and greatly enriched and oppressed the people. At the same time, a mysterious group of righteous people sneaked into Tongcheng, in order to find the "treasure map" to change the fate of the country. After a lot of difficulties, they rob the rich and help the poor, and start a fierce struggle with Jin Sansheng.

Kung and Kin's rivalry goes way back to the seventies when they fought over the same girl, who eventually became Kung's wife. Now they run competing phone stores right across from each other on Mongkok's busiest street, and stretch their minds trying to outdo each other with crazy promotions.