In order to repay her father's huge debt, the female protagonist Su Wan signed a "White Moonlight Substitute" agreement with the male protagonist Lu Chen, playing the role of his docile and well-behaved fiancée. During the agreement, she relied on her amazing meteorological data analysis skills to accurately predict the impact of extreme weather on the futures market several times, secretly accumulating original capital. When Lu Chen's old love Bai Yueguang returned and tried to force her away, Su Wan elegantly tore up the agreement and turned around, as the chief analyst and largest individual shareholder of a hedge fund, to carry out precise "weather strikes" against Lu Chen and his hypocritical partners in the business war, making everyone who despised her pay the price. During the confrontation and pursuit, Lu Chen gradually discovered that he had long been sincerely attracted to this calm, intelligent "stand-in" who only had eyes for money, and that behind the so-called "return of old love" there was a huge conspiracy about jealousy and deception.
