The capital city during the Yongle period should have been a prosperous scene, but a series of bizarre murders broke the peace. Young women were murdered one after another, and a strand of black hair was cut off before they died. There was no trace of the murderer at the scene, as if they were haunted by ghosts. The name "Black Silk Cut" made people in the capital panic.
Shen Yan, the head of the Shuntian Mansion, seems cynical, but in fact has a keen eye. After taking over the case, he repeatedly encountered obstacles. Just when he was at a loss, he accidentally met Su Qingyan, the proprietress of "Jinxiu Pavilion". Not only is Su Qingyan's embroidery skills superb, but her understanding of fabric threads is unparalleled. She started with a special piece of fabric at the crime scene and provided key clues to Shen Yan.
One is a catcher who seems unreliable but has a hidden edge, and the other is a smart and well-informed embroidery shop proprietress. The two unexpectedly join forces because of this murder. As the investigation deepened, they discovered that there was a lot of mystery behind the case, involving old cases from many years ago and the secrets of the powerful people in the capital. Faced with pressure from their superiors, difficulties from their colleagues, and threats from the powerful, can they stick to justice and uncover the truth behind "The Black Silk"? Where will this relationship, which was formed due to the case, go?
