Jade (Michelle Hu) is a charming yet feisty royal bodyguard. The Queen (Kingdom Yuen) is worried that the King may have his eyes set on her, so she confers on Jade the title of "Royal Sister" and helps her recruit a good husband. Jade falls for a candidate named Sean (Benny Chan) at first sight and secretly helps him to win the contest and they got married. A few months later, Sean meets Muse Qin (Jacky Cai) at a newly opened brothel. They fall in love with each other instantly. What Sean doesn't know is Muse sneaks into his life with a plan to sabotage the country.