The heroine Shen Jingzhi was forced to replace the missing Bai Yueguang of the aristocratic family. She married into the powerful regent's palace and became a substitute mistress. After the marriage, she was subjected to all kinds of cold eyes and calculations. In a desperate situation, the "Performance/Drama System" is integrated, and by extracting different identity scripts (cold miracle doctor, charming troublemaker, iron-blooded escort, etc.), The characters can be seamlessly switched in the mansion, business world and court, and the situation can be broken through drama and rebellion. The male protagonist Xiao Jingheng went from being coldly scrutinizing and using temptation at the beginning, to being gradually attracted by the multi-faceted and vivid soul of the female protagonist, and fell into the ultimate pull of "how many faces does she have?" The two of them worked side by side to overcome the bloody situation of losing their vests, reshuffling their power, and fighting for their heirs. They joined forces to overthrow the mastermind behind the family and break the curse of the double.