Revenge

In the third year of the Tian Shou era, Crown Prince Song Ling was assassinated, an event known as the "Thorn of Tang" case. Su Luo Wei, the daughter of a renowned minister and childhood sweetheart of the Crown Prince, marries Song Lan, the Crown Prince's beloved younger brother, to investigate the truth behind the case. However, she later discovers that the assassination was a treacherous plot orchestrated by Song Lan to seize the throne. To restore order to the court and avenge her lover, she decides to use Ye Ting Yan, a close advisor to the Emperor who has returned north, unaware that he is none other than the Crown Prince himself, who believes she has betrayed him.