The heroine, who came from a family of bodyguards, had her family wiped out by a mysterious force. In order to track down clues, she disguised herself as a man and entered the capital under a pseudonym. She accidentally rescued the young emperor from an assassination attempt in disguise and was forcibly recruited as his personal bodyguard and brought into the palace. In the crisis-ridden palace, the heroine relies on her outstanding martial arts and worldly wisdom to repeatedly smash the conspiracy against the emperor, from assassination to poisoning, from the former dynasty to the harem. Her straight-forward "feminine" style is incompatible with the intrigues in the harem, but she unexpectedly gets the emperor's special attention. As they get along with each other for a long time, the emperor sees through his daughter's identity and is attracted by her unique and tenacious charm. In the process of fighting side by side with the emperor, the heroine gradually discovers that the tragedy of her family's death is inextricably linked to the battles in the court and the change of imperial power. She no longer only wanted revenge, but also to protect the emperor and the people of the world, she resolutely got involved in the torrent of seizing the heir, suppressing rebellion, and resisting foreign aggression. In the end, she killed her enemies with her own hands, and with her unshakable achievements and abilities, she broke the worldly prejudices and transformed from a slut who did not know the palace rules to a queen who stood side by side with the emperor and was famous in history.
