Modern female detective Shen Qingci dressed up as the newlywed wife of Xie Yu, the minister of Dali Temple in the Great Zhou Dynasty. She was struck by lightning three days after visiting the temple and exchanged bodies with Xie Yu. Shen Qingci used Xie Yu's identity to investigate the unsolved cases in Willow Lane, and Xie Yu used Shen Qingci's identity to secure the back house. The two were forced to cooperate, and gradually developed trust in the process of investigating the case and surviving. The clues Shen Qingci found pointed to the Yutang Courtyard on the outskirts of the city. When Zhao Chong, the chief minister of the dynasty, noticed it, he began to put pressure on him to silence him. Shen Qingci's identity was revealed, and Xie Yu took the blame for her and was imprisoned. In the end, the situation turned around and the two exchanged bodies, and Shen Qingci chose to stay in Da Zhou.
Concept: A modern female detective swaps bodies with her husband, the minister of Dali Temple. She uses his identity to investigate unsolved cases and interrogate criminals to court, while he uses her identity to serve tea and deal with the old lady. The ancient and modern criminal investigation thinking collides with the ancient power schemes, and the two lines run parallel.