In Jianglin City in the Republic of China, there was a strange detective named Shen Que.
Others rely on murder weapons to investigate cases, but he relies on mud on the soles of his shoes, oil on his cuffs, and a broken copper wire.
A rickshaw driver disappears out of thin air, a famous theater actress is murdered in a secret room, gold from a vault disappears, a tram disappears entirely when it enters a tunnel...
Everyone is looking for the murderer, but Shen Que is staring at the unreasonable little details.
He said that a single piece of evidence cannot determine the case, but if the evidence is connected in a chain, the truth must be recognized no matter how outrageous it is.
Until he picked up a black piece.
From docks to isolated islands, there's a chessboard behind every mystery.
Shen Que was cracking the secret room while making venomous remarks. He also had to be wary of his "other self" who looked exactly like him, but had a mirror image of his handwriting and opposite habits.
The most terrible thing is that the master who raised him seems to be the one who takes the lead.
"Isolated evidence does not stand up, but a series of links does."
This time, Shen indeed wanted to lock the chain of evidence to that person's head with his own hands.
