The continuous rain in late spring soaked the bluestone roads in Qingchuan Town and softened the red lacquer door lintels of Jinxiu Square in the west of the town. Su Wanqing, the female shopkeeper of Suji Bookstore, was originally an ordinary woman hiding in a pile of old books. However, because of a blood-stained lotus root and a wisp of indigo silk thread belonging to the Shen family's dye house, she was involved in the mystery of the disappearance of Shen Wanshan, the shop owner of the dye shop.
The county government's verdict of "falling into the water" was full of flaws in her eyes: the "Map of Qingchuan" that Shen Wanshan hurriedly purchased at dusk, the crooked "ten" notch on the wall of the dye vat, the messy soap boot footprints on the floor of the inner hall, and the embers of the account books that were deliberately burned... Each and every one of them pointed to a well-planned murder.
The ancient town filled with rain and fog hides unspeakable secrets; the seemingly peaceful neighbors have their own ulterior motives. A female prostitute, with no official or position, only uses a pen and a pair of eyes to pick out clues. When the fog is lifted layer by layer, behind the murder case in the dyeing shop, there is actually a more secretive past event involved.
The rain in Qingchuan was still falling, and Su Wanqing stood holding an umbrella, stepping deeper into this mysterious case covered up by the mist and mist, vowing to find out the truth hidden behind the rain and mist.
