Mu Yunjin, the rebellious eldest daughter of the powerful Mu family, resisted business marriage and spent a lot of money at an auction to buy the seemingly down-and-out Imperial University student Su Shijin as a "pet". Little did they know that Su Shijin was the founder of the mysterious technology company "Yinzhou" who concealed her yandere nature and was involved in a crime ten years ago. After being rescued by her, she became obsessed with it. Later, the Ji family framed the Mu family and involved an illegal genetic experiment conspiracy. The two worked together to fight and uncovered the secret that Mu Yunjin had mania and that Su Shijin was a product of genetic modification. They finally defeated the enemy, tore up the absurd contract, and made a promise to stay together for the rest of their lives.
