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.
Starting from the counterfeit banknote case, they discover its connection to Chief Minister Su and Xie Yu Heng, prompting them to go deeper into the investigation. From initially being at odds, they gradually develop feelings for each other. Despite the dangers, they work together to get close to the individuals involved in the counterfeit banknote case. As they gradually uncover the truth, they expose Xie Yu Heng’s conspiracy to seize power and usurp the throne. It turns out that Xie Yu Heng is not of royal blood. In order to seize the royal power, he makes the counterfeit banknotes to amass wealth, bribe officials, and establish an assassination organization called the “Vermilion Bird Pavilion” to eliminate dissidents.
Because Chief Minister Su discovered that Xie Yu Heng was the mastermind of the counterfeit banknote case before his death, Xie Yu Heng ordered his men to steal Su’s official seal and fabricate documents framing Su for treason.
