The neon lights went out and the candles suddenly brightened. Modern designer Xia Weiwei opened a book on a rainy night, and when she opened her eyes again, she was already wearing a skirt and became a wealthy lady in the boudoir of the Marquis of Chang'an. The red thread of fate was quietly entangled, and she was forced to turn into a detective assistant and shuttle through the streets of Chang'an side by side with the cold-faced Shaoqing. Under the eaves of the palace wall, the swaying palace lanterns are filled with mist; in the deep courtyard of the wealthy family, intrigues and suspicions surge into undercurrents, conspiracies and true feelings overlap into volumes, and puzzles and choices are intertwined. Can she get through the turbulent court disputes and solve the thousand-year mystery? When the truth gradually emerged like the dawn, she realized that this time travel was no accident, but a fateful reincarnation that spanned thousands of years, a bond of cause and effect between the past and present lives. How should she make a fateful choice between modern civilization and the glory of the Tang Dynasty?