Xia Nian'an breaks up decisively after catching her boyfriend Qin Shaoyu and her cousin Xia Muqing betraying her, but is then forced by her uncle's family to substitute in a marriage into a wealthy family. To win back the equity of Yuehua Group left by her mother, she mistakenly enters a flash marriage with Pei Jinting, the heir of the Pei family. Originally just a contract marriage of mutual convenience, it gradually turns into true feelings through wave after wave of standing shoulder to shoulder in counterattacks. Facing the scumbag's entanglements, her cousin's framing, her uncle's seizure of property, and the Pei family's succession struggle, Xia Nian'an continuously uncovers her hidden identities as a divine doctor, hacker, and more, joining forces strongly with Pei Jinting to slap the villains in the face, protect the family business, and harvest a love matched in strength.