666 AD. Judge Ti is appointed commissioner in Han-yuan, a small town built on the banks of a mysterious lake. Its waters were said to come from the Underworld, and strange creatures inhabited its depths, snatching unsuspecting fishermen and pulling them into its murky depths. Every night, the infamous "flower boats," these colorful illuminated floating brothels where exquisite courtesans entertained enchanted guests, sailed on the open waters of the lake, with songs and laughter echoing in the black waters.

In this strange town, where sensual pleasure intertwines with dark mystery, Judge Ti is confronted with the sudden death of a young dancer. As soon as he begins the investigation to solve the crime, the mysterious case of another young girl who is found dead on her wedding night comes to court. Things will take an uncontrollable turn when Judge Ti finds himself entangled in the intricate web of an underground conspiracy woven around the terrifying sect of the White Lotus. Three strange cases, three puzzles that only Judge Ti with his deductive abilities will be able to solve.