In the spring of 1927, Shanghai Beach. Shen Zhiwei, the daughter of a wealthy businessman who was used as a marriage tool by her family in her previous life and eventually died tragically in a house fight, was reborn on the eve of her eighteenth-year-old engagement party. In this life, she broke her engagement and announced in public: "What I want to open is not a silk shop, but the first modern women's underwear factory in China." In an era when women's bodies were still a taboo topic, she relied on her past life memories: using French lace craftsmanship to improve Chinese bellybands, and published the first women's underwear advertisement in Shenbao. She used the "women's liberation" trend to open up the socialite market and competed with foreign companies for textile machinery. Her career had just started to improve, but she was involved in a warlord melee due to a batch of imported steel rings. During the confrontation with a gun at the dock, she met Lu Chenzhou, the governor of Jiangbei who was investigating smuggled arms. "Women shouldn't touch these things." He glanced at the steel ring in her hand coldly. "The warlord is talking about the steel ring, or the power?" She threw the sample into the Huangpu River with her backhand, "I made it myself." From mutual use to fighting side by side: she provided him with military uniform orders to stabilize the rear economy, he helped her deal with the harassment of the Qing Gang and open up the Yangtze River shipping, she designed the "cheongsam petticoat" that could hide intelligence, and he found soldiers on the front carrying the peace charm from her factory. When Japanese trading companies joined forces with local conservative forces to encircle her factory, and when the clouds of war enveloped Shanghai, he pointed his sword at the map: "My arsenal lacks a boss lady who knows how to manage." She unfolded the design drawing: "My underwear empire lacks a partner who can fight." This is a game between cheongsam and military uniforms, a marriage between business and guns. In the war-torn times, she not only has to be the master of her body, but also the curve of the times.