I'm not sure which book you're referring to because you didn't provide enough information. However, according to some of the novel types and plots that I know, I can provide you with some possible clues. If you're referring to novels like " The Secret Service Queen Mother," then it might be a story about a modern female secret agent who traveled to ancient times to become a queen mother. In this story, the emperor might have traveled to this ancient world and had an emotional entanglement with the empress dowager. If you're referring to a novel like " The Empress 'Strategy," then it might be a story about a modern female agent who traveled to ancient times to become a queen. In this story, the emperor might have traveled to this ancient world and had an emotional entanglement with the queen. If you are referring to other types of novels, then you need to provide more information so that I can provide you with a more accurate answer.