Assigned to investigate various regions in Jiangnan, Detective Di Renjie becomes entangled in the mysterious disappearance of a young girl in Lin'an City. His inquiry uncovers connections to a local cult rife with debauchery and a web of intricate, puzzling clues. As a sinister monk's presence looms, Di Renjie uses his remarkable intellect to unravel the complexities of the case, inching closer to the truth in a thrilling clash between justice and evil.