Lin Wei, a top investment banking VP in the modern world, dies suddenly from overwork and awakens in the body of Su Qingyan, the legitimate daughter of the Marquis of Jing'an. In an alternate Great Yong dynasty, Su Qingyan had just been pushed into a lake after being framed by her stepmother, Madam Liu, and her half-sister, Su Wanrou. Armed with the sharp logic and negotiation skills she honed in the corporate world, Lin Wei takes down the scheming white lotus, exposes a corrupt conspiracy, and unexpectedly obtains a manual of the Mohist school’s mechanical arts. She launches into business warfare with inventions like soap and glass mirrors, carefully navigating a world of political intrigue.
After a chance encounter with the cunning Prince Rui, Xiao Jue, the two go from using each other to fighting side by side. She improves weapons with her mechanical expertise and helps introduce new policies, enabling him to ascend the throne. As she digs deeper into her quest for revenge, she uncovers a conspiracy involving her stepmother and the Shadow Bureau. She also discovers that she is part of a civilization experiment spanning time: she was chosen by the future Time Administration, and the energy field of the Mohist school in Great Yong secretly resonates with modern technology.
As ancient mechanisms clash with future technology, Lin Wei not only avenges the original Su Qingyan but also reforms the Mohist school through the principle of universal love, advances the nation through technology, and ultimately joins Xiao Jue in ruling the realm. Amid political intrigue, love, and hatred, she transforms from an avenger into a guardian of civilization, weaving together the wisdom of past and present in a legendary tale of the dynasty.