Sai Yeung Choi Street in Mong Kok, Hong Kong is full of shops and an endless stream of tourists. Ha Gong (Zeng Zhiwei is acted the role of) and Shi Jian (Zhang Xueyou is acted the role of) the mobile phone shop faces each other across the street, the two come up with strange tricks to grab business, do not give way to each other. In fact, the two were friends many years ago, and the story of their witty bag renter is still a good story, but in the end, it turned out to be a feud for Xiao Tao Hong (acted the role of Yuan Anyi). Today, Xiao Taohong and Ha Gong love each other, but they still care for their former good friend Shi Jian from the bottom of their heart. The sons and daughters of the two families also had exchanges in private, and gradually became fond of each other. The rents of the big landlords have to be tripled, which bothers the merchants. Mysterious people frequently throw sulfuric acid water from high places, and people living in the side streets are in panic. In order to safeguard the rights and interests of survival, in order to return Sai Yeung Choi Street to peace, the merchants decided to unite as one and defend their homes together. This film is co-produced by Shaw Brothers and TVB, and is known as the Hong Kong version of "the Founding of the people's Republic of China" because it brings together more than 100 stars from the two sides of the strait.