My name is Xiao Wu, and I am a private detective working in the foggy city. This city is always shrouded in lingering moisture, like the secrets hidden in dark alleys that cannot be seen in the light, but always surface on a rainy night.
My "assistant team" is a bit funny to say: Brother Legs is a street tipster, with more leg hair than clues; Brother Dog runs a shabby car repair shop, and his nose is sharper than a police dog, specializing in sniffing tire tracks and the smell of gasoline; Brother Laobi works for a living at the dock, and he is so good at water that he can be fished out of the bottom of the river for ten years. A-Bian is a locksmith, there is no door that he can't open, and there is no mouth that he can't pry open... There is also Hou Guanjun, who always likes to brag, Xiao Jiang, who has never graduated from forensic medicine, and Uncle Tie, a former gangster... This group of people who seem to be out of place are actually the pieces of the puzzle that I use to solve the mystery.
When a series of seemingly unrelated murders occur one after another - an entrepreneur in a secret room, an Internet celebrity hanging from a clock tower, a painter who died in his own painting - a strange bronze key is left next to the deceased. I know this is no coincidence. The fog in the foggy city is getting thicker and thicker, and my partners and I must uncover the true identity of the murderer before the next victim appears. But none of us realized that behind this key, there was a dark past that could subvert the entire city, and each of us was already a pawn in this chess game...
