In Ancient China, there existed a legendary kingdom called the Land of Daughters. In this place, the traditional gender roles were reversed, as the women held the power while the men obediently served on the women's whims. ShengNan is an ordinary modern day girl, but she accidentally went through a time portal and arrived in the Land of Daughters! What's more, she looks exactly like the Duke! Of course the Duke switched places with ShengNan, only to lure out his enemies and strike them from behind. However, the Duke's wife fell in love with ShengNan and... ShengNan fell in love with the Duke's enemy?!