During the Republic of China, under the impact of the new culture, clothing culture entered a prosperous and diversified era, with all kinds of beautiful clothes competing for splendor and blooming. At the same time, Yunyifang and Qinfu Cloth Shop in Caiyun Town are also in fierce competition. Mi Jiuer, who has a lively personality and grew up in a slum, is a "flowing water hero" who robs the rich and helps the poor for a living. The two people who were originally unrelated met Lu Yiling, who looked the same as herself, in order to avoid the government's city-wide wanted list. By mistake, Jiuer wanted to sneak into Yunyifang as Lu Yiling, and made many oolong jokes for this. Luo Yinran also went from suspicion, temptation, and precaution to appreciation and attraction for this "Lu Yiling" with a drastic change in temperament. At the same time, Pei Zhuo (played by Fan Xiaodong), the son of the Shanghai Chamber of Commerce, who had met Jiuer in Caiyun Town, came to Yunyifang and Qinfu for inspection. While helping Jiuer avoid Luo Yinran's temptation, it also brought a lot of challenges to the gradually warming "Ranjiu" relationship.