In the 1970s, young sworn brothers Shek Kin and Ha Gong became a pair of vindictive enemies for their mutual love for Xiao Taohong. Until 2010, Sai Yeung Choi Street in Mong Kok, Hong Kong, was a must-fight place for businesses. Merchants used all kinds of ridiculous tricks to compete for customers. However, in the midst of the panic of large landlords raising rents and forcing evictions, inspired by the belief of "everyone for me, I for everyone", the merchants, who were also citizens of Xingdou, developed a warm relationship. The triangle relationship between Shek Kin, Ha Gong and Xiao Taohong, the love between the next generation of the Ha and Jian families: the ideal otaku Ha Zai and the trendy and lively Jian Mei, and the love between the kung fu girl Ha Nu and the lazy and frivolous Jian Zai, also had to come to an end at the same time.