Lin Xiaomei, the backbone of the modern archaeological community, came into contact with a mysterious jade pendant while excavating an ancient tomb. She accidentally traveled through time and became Su Qingwan, the silly legitimate daughter of the Prime Minister's Palace of the Yao Dynasty. She also became the quasi-princess that the aloof third prince Xiao Jingyan avoided. After her wedding was abandoned, she lived in a remote Xianyun Courtyard. She originally wanted to lie down and engage in ancient archeology, eat and wait for death, but with her unique skills of identifying treasures and antiquities, she accidentally slapped the servants who despised her in the face, solved the weird and strange things in the palace, and slowly melted Xiao Jingyan's cold heart.
From being full of disgust to being defeated step by step, the cold prince embarks on a clumsy road to pursue his wife. The two work together to resolve the palace frame-up and reveal the secret of the fate of the jade pendant that spans thousands of years. When returning home and finding her true love were before her eyes, she finally chose to stay by his side. From a quasi-queen in the cold palace to an empress who only loved him all her life, she composed a fantasy and sweet love song across time and space.