The secret guard Qingshan has been serving the prince Xiao Mu'an for ten years, but was sent to the jealous prince Wei Zhaomian. Because she was suspected of having an affair with the prince, she hired her childhood sweetheart, He Yungui, a new girl in the department, to act as a couple. This actually made the prince so jealous that he even directed and acted in the assassination to retain her. During the relationship, Qingshan discovered that the princess was the little girl he had saved back then, and He Yungui had already been deeply in love with him, and Qingshan was also moved. The prince's paranoid love turned out to be wishful thinking, and Qingshan and He Yun returned to Beijing to stay together. Many years later, the late Emperor Xiao Mu'an passed away, leaving behind a letter expressing his deep affection. Qing Shan should be recalled to Beijing to take charge of the imperial army to protect the crown prince and the queen mother, and continue his mission of guardianship.
