An ancient bronze mirror connects two worlds separated by five hundred years. The modern girl Zhang Yuyan was taken into the deep palace of the Chenghua period of the Ming Dynasty on a full moon night, and met the future emperor Zhu Youtang, who was only six years old and struggled to survive a conspiracy. From then on, she became the only light in his gloomy childhood, bringing food, medicine, knowledge and companionship across time and space. Time passed rapidly in the Ming Dynasty, and a child grew up into a calm prince. Zhang Yuyan's life in modern times also continued, and her family went from being shocked to becoming her most solid support. Faced with the ever-increasing pressure of Concubine Wan Gui, the turbulent undercurrents of the palace, and the unpredictable traversal patterns of the bronze mirror. When they grew up, Zhu Youtang and Zhang Yuyan had a good impression of each other, and a spark of love arose. A love that travels through time and space makes people envious *^O^* Many difficult feelings in history books have perfect endings.