Zhang Chuxi, a modern mortician, accidentally traveled to the body of the only "Queen" of the Lan Kingdom, and was assassinated by Su Ningze, an assassin sent by the prince, as soon as she woke up. Zhang Chuxi, who wanted to have a complete love, cleared the fog and survived the dangers in the confusing royal power struggle, and fell in love with Su Ningze in a series of events. However, just when the two finally opened their hearts and decided to be together, the body that Zhang Chuxi traveled through gradually woke up and began to deprive Zhang Chuxi of consciousness. The evil prince is about to return, why is she dressed as a man? What is the connection between the assassin and Zhang Chuxi, and what kind of fateful marriage do Zhang Chuxi and Su Ningze have?