Synopsis：Princess Yue Changge safeguards her younger brother’s claim to the throne by resisting corrupt officials and winning battle after battle. On her way back to the capital, she is ambushed, and her cousin Fu Qingluan is accidentally killed. With her dying breath, Fu Qingluan reveals years of abuse by her in‑laws and begs Yue Changge to avenge her and raise her young daughter. Disguised as her cousin, Yue Changge infiltrates both the household and the court, seeking justice while uncovering a web of conspiracy. Reuniting with Yun Chuxu, the man whose engagement she once broke, they clear up past misunderstandings and join forces to defeat their enemies, restoring order and finding lasting happiness.