The top secret room murder case in the city, with ineffective surveillance and no fingerprints.
The police were at their wits' end, but Yan Su, the "sickly beautiful" boss of an eccentric detective agency, easily cracked the case.
His witnesses are not human beings.
A pot of flowers at the murder scene, a stray cat on the street corner, and even... A wisp of wind blowing on the murderer's cheek, all silently told him the truth.
Qin Feng, the captain of the Iron-Blooded Criminal Police, was shocked: "This is unscientific!"
Yan Su chuckled: "The end of science is me."
Criminals all over the city were frightened by the news, because no one knew whether the next person to testify against them would be a stone or a fallen leaf.
No one knows that this mysterious detective who can knock down special forces with one punch and is proficient in all things ancient and modern has not only lived for thousands of years, but is also... Her?