The Jiangzhou City Police Department has a consultant who never wears a uniform. His name is Pei Yan. He can talk robbers into surrendering with jokes and reconstruct an entire crime scene from fallen leaves. Beneath the city's calm surface, undercurrents stir and bizarre murders keep happening, each case revealing a crack in human nature.
A symmetrical torture case shatters the peace: a woman has had eight teeth pulled, and the scene bears no trace of the killer. The police are at a loss, but he says, "At least the killer has an eye for aesthetics." One cool glance, and he sees through the logic behind the crime.
After unexpectedly gaining a golden finger, he finds that his mind automatically generates rigorous chains of reasoning. To him, any detail can be the start of a story, and lies crumble before a closed loop of evidence.
He sees through disguises in three sentences and uses logic to reconstruct the truth. Others see bloodshed; he sees motives and loopholes. While ordinary people are caught up in the mystery, he's already cracked the trick with a joke.
Others advance by following clues; he overwhelms cases with sheer intellect. While the police are frazzled, he sips coffee and tells jokes. Everyone else is searching for answers; he already knows how it ends.
From then on, no case, however complex, can escape his mouth or his mind. The evil hidden in everyday life will eventually be exposed with a laugh by a man who tells jokes.
