There is an old antique shop in the back alley of Jiangnan. There lives a young man named Boss Ruan and an errand boy. No one knows their names, just like no one remembers what they look like. A sky-blue oil-paper umbrella separates the two worlds.
The story also begins with the visits of two expedition teams. Regarding the massacre a hundred years ago, the treasure hunt with a mysterious ending, a yellowed letter, and even memories from a longer time ago, it seems that the answer to everything lies in Boss Ruan.
"Su Xuan, will you remember me?"
"Yes, definitely."
Whether it's in Yanyu Jiangnan or in Beijing, Boss Ruan.