Su Tang, a pragmatic widow who runs a small wine shop after her husband's death, mistakenly took the secret account book left behind by the steward of an imperial merchant while asking for payment. At the same time, in order to avoid political marriage and pretend to be sick, Shen Zhao, the daughter of the minister, is being ordered to secretly investigate the suspicious case of the family business route.
Su Tang was chased by a mysterious man for his account books, and while hiding, he broke through Shen Zhao's "sick" disguise. As the pursuers approached, Shen Zhao had to save Su Tang to protect himself, and the two were forced to form a temporary "master-servant" alliance.
Starting from the account books, they encountered tribute transfer cases, water transport shipwreck mysteries, and border military supplies smuggling cases one after another. Every time a case is solved, it gets closer to the core and attracts more dangerous enemies.
All cases point to a huge "Film Chamber of Commerce" whose members are spread across the government and the public, and are even involved in the dispute between emperors and heirs.
Intention: "You are my courage to escape from the golden cage, and I am your confidence to settle down in troubled times."