In the seventeenth year of the Republic of China, the smoke and rain in the south of the Yangtze River enveloped the smoke of the times. Xu Zhaozhao, the legitimate daughter of the Xu family embroidery workshop, was famous in Suzhou for her superb Su embroidery skills. However, because her family was involved in an arms smuggling case, she fell from the clouds into the quagmire overnight. In order to save her imprisoned father, she was forced to take her ancestral embroidery book to find the mysterious "Mr. Tan" - Tan Shihuang, who is rumored to control half of Shanghai's arms business. When we first met, he was the noble man lounging on the sofa at the banquet, with a cigar between his fingertips and eyes as cold as ice; when we met again, he was the mysterious man who rescued her on the execution ground, with a black trench coat stained with night dew, and an undeniably strong tone. Xu Zhaozhao used embroidery as a blade and worked his way through the turbulent Shanghai business world, but he didn't know that he had fallen into the love network set by Tan Shihuang. Tan Shihuang thought he was in control of everything, but when he saw her fingertips bleeding while she embroidered all night to save her father, he was willing to subvert his own rules for her. When family grievances intersect with the currents of the times, when love and conspiracy collide, can this pair of men and women in troubled times protect each other in the storm, and let the gentleness of Su embroidery and the coldness of military weapons bloom the toughest flowers?