Wenbo, 27 years old, is the owner of a second-hand bookstore that is on the verge of bankruptcy. He has had a strange disease since he was a child - every time he has a high fever, he can see things that ordinary people cannot see. This disease has been with him for more than 20 years, and he has long been accustomed to it, treating it as just the background noise of life.
Until the day his grandfather passed away, he saw his grandfather's portrait in the mourning hall and winked at him.
That night, he found a handwritten note in the middle of the old book box left by his grandfather. The title page said: "Descendants of the Wen family, if you see this book, it means that I am no longer here. You must take over the business of the 'Yin Shang'. Remember three iron rules: first, don't ask them why they want to buy; second, don't ask them what to pay for; third, never open the door to welcome guests after midnight."
For the first time, Wenbo learned that the bookstore that the Wen family had passed down from generation to generation was not a bookstore, but an ancient shop that only served "another world" - Yin Shang.
Grandpa's last words were only one sentence: "Find 'Changming Street', where there are answers to all your questions. But don't believe anyone, including the dead."
This book is the beginning of Wenbo's journey into the mysterious business empire between the yin and yang worlds.
