A bizarre murder occurred in Beiwa County, and the deceased was Gu Kai from a bar. Detective Miao Hong discovered during the investigation that the case was intertwined with the secret love affair of a pair of teenagers. As the past of the deceased is traced, an old crime that occurred in the orphanage gradually emerges, entangled like a ghost in the fate of all those involved. Love and protection are alienated in a twisted environment, eventually leading to irreparable tragedy.