In the seventh year of Jiajing, the capital. Tang Yan, the daughter of a foreign minister in the Ministry of Etiquette, is a mediocre and transparent person whose father did not care for her and her mother died young. Her only secret is that she has a storage space and a fat orange cat that she has raised for many years. A "skin-peeling case" broke out in the capital, and his father was involved in it and was sent to prison. In a desperate situation, the fat orange cat suddenly uttered human words and took out the token of the commander of the Jin Yiwei from her space! It turned out that it was Li Chenfeng, the iron-blooded commander who was plotted by a political enemy and left his soul to possess the cat.
In order to save her father and protect herself, Tang Yan reached an agreement with the "cat master" Li Chenfeng. She used the space to help him hide, pass on information, and steal evidence; he used his knowledge of the court and criminal investigation to guide her in autopsy investigations and dealing with the powerful. During the day, she was a submissive official lady; at night, she hugged the cat and climbed over the walls, repeatedly solving strange cases. The one-man-one-cat combination made waves in the capital, and Tang Yan grew from an unknown young lady to a remarkable heroine. They not only want to clear away Tang's father's grievances, but also find out the mastermind behind Li Chenfeng's plot and attempt to subvert the government. When Li Chenfeng finally returned to his true form and resumed his identity as a powerful commander, he blocked Tang Yan in a corner and said in a low voice: "My innocence has been ruined by you, how are you going to take responsibility?"
