The top secret guard Qing Shan is the personal bodyguard of the Crown Prince Xiao Mu'an, but he is jealous and makes things difficult for the Crown Prince's guard Zhao Mian. In order to avoid suspicion and save her life, Qing Shan pretends to be a couple with her childhood sweetheart, He Yun Gui. Unexpectedly, the prince becomes so jealous that he directs and acts in an assassination farce. Qingshan unexpectedly discovered that the Crown Princess was an old acquaintance, and realized her own feelings. She finally rejected the Crown Prince's affection and left Beijing hand in hand with He Yungui. Many years later, she returned to Beijing, understood the prince's legacy, and chose to protect the country and her old friends, and the story ended successfully.
