Bloody Lantern Festival: Imperial palace maid Yun Xiu assassinates the king at the Lantern Festival banquet, and unexpectedly discovers that the prince Zhu Yiming is actually the "Ming Yue Gongzi" with whom she shared difficulties three years ago.
Suspicious gold hairpin: The Bingdilian gold hairpin carried by the prince became a key piece of evidence, leading to the truth that the Yunxiu family was framed for rebellion three years ago, as well as the power game between the emperor and the Donglin Party.
Double-sided life: Yunxiu has to play the role of a docile palace maid in the depths of the palace, and also needs to track down the clues to the murder of that year, but she does not know that she is falling into a series of traps set by the emperor.
Dilemma between love and love: Shen Cang, the commander of the secret guards, was ordered to monitor Yunxiu and witnessed her benevolent actions of taking care of the crazy and abandoned concubine in the cold palace and taking the punishment for the little palace maid. Cracks gradually appeared in her hard-hearted heart.
The truth vortex: When Yun Xiu finally found the secret letter that could prove the innocence of his father and brother, he found that the handwriting was actually from the hand of the prince, and the jade pendant on Shen Cang's waist was exactly the same as the mark of the officers and soldiers who massacred the city.