Lin Wei, a modern forensic doctor, traveled through the Republic of China with a mysterious pocket watch and became the famous "Third Miss" in Shanghai. When a murder suddenly occurred, she shocked everyone with her state-of-the-art forensic knowledge, and even became a partner with Lu Yanzhi, the detective of the French Concession. Embroidered shoes cost lives, a daughter was kidnapped, a national treasure was mysteriously stolen... Behind a series of strange cases, they all pointed to a huge smuggling organization wearing a silver mask. When the time-travel pocket watch warned again, between returning to modern times and staying in the Republic of China, Lin Wei resolutely chose the latter and joined hands with Lu Yanzhi to open a detective agency. In the turbulent times, they guarded their homeland and each other.
