In 745 AD, Li Mingyue, Princess Hele of the Tang Dynasty, encountered an accident on her way to get married. She traveled to the Dunhuang Film and Television City in 2025, and accidentally became the "Tang Rishi" of the costume crew. She used her authentic knowledge of Tang Dynasty etiquette to resolve the crew's problems, but was still ignorant of the modern world. Top star Shen Yan was attracted by her ancient charm and professionalism during the cooperation. From questioning to falling in love, the two gradually fell in love during the ironic collision. When the love affair was exposed and caused a turmoil, Shen Yan firmly protected her, and Li Mingyue also confessed the secret of time travel. An unexpected thunderstorm gave them an opportunity to travel back in time, and Shen Yan chose to follow her back to the Tang Dynasty. In the end, the lovers who spanned thousands of years stayed together in their hometown of Chang'an and used their respective wisdom to open a new chapter of life in the prosperous Tang Dynasty. Their story also became a legend passed down to future generations.
