On a rainy night, the third prince of the Ming Dynasty, Li Weimin, suffered a palace coup. He fell into the abyss with a blood-stained jade pendant with a dragon pattern, but was accidentally drawn into a rift in time and space and traveled to modern Beijing three hundred years later. Beside the turret of the Forbidden City, he was rescued by an intern at the Jinta Tower. He was reduced from the royal prince to an "ancient man" who knew nothing about cars or mobile phones. The grief of losing his country and his family and the impact of a strange world left him in a desperate situation. And Jintata's kindness and patience are like glimmers of light penetrating chaos - she taught him to eat bread and recognize neon lights, led him to appreciate the novelty of modern civilization, and also gently soothed his pain that spanned a century. When the majesty of an ancient prince meets the freshness of a modern girl, when the weight of past events of family and country collides with the warmth of mortal fireworks, the two hearts gradually get closer through the ironic running-in and mutual support. An encounter that spans time and space eventually becomes a destined bond. Can they protect this quietly sprouting love in completely different worlds?