Mu Xiao traveled to another time and space and became Princess Lingyi of Xia Yan Kingdom. Xia Yan is a country ruled by a female monarchy, but the current queen, Emperor Zi, was unable to have children after giving birth to Ling Yi. In order to stabilize the throne, Emperor Zi had to disguise Ling Yi as a woman and raise her as a princess, and trained several loyal men to protect Ling Yi. Mu Xiao adapted to Lingyi's identity, and used Mu Xiao's name and body to open a gambling house in Quecheng, the capital of Xia Yan, secretly collecting information to help Emperor Zi govern the country. In the gambling house, Mu Xiao met Shuo Qi, who was two years older than him. He was a businessman from neighboring Lingjie. The two hit it off and became good friends. As Lingyi's eighteenth birthday approached, marriage was also put on the agenda. Mu Xiao saw Shuo Qi's name on the list of candidates for a son-in-law.