On the day when Su Ying Ying, the daughter of the loyal Chief Minister Su of the Cabinet, was married to the second prince Xie Yu Heng, her family was massacred by Xie Yu Heng and his troops on the grounds of the Chief Minister Su's alleged treason. Xie Yu Heng thus ascended to the position of the crown prince. Three years later, Su Ying Ying returns to clear her father's name and uncover the truth behind the treason case. Teaming up with the seventh prince, Xie Yi An, she disguises herself as Xie Yi An's maid, Su Ying.