Little Taoist nun Zhu Xiaoyu possesses the ghostly netherfire of a hundred ghosts, enabling her to communicate with spirits and help departed souls settle their lifetime regrets. She successively helps Granny Su retrieve Cuicui, who was abducted, sold, and brutally murdered, clearing a miscarriage of justice; she is also entrusted by the departed soul Hongyu to track down her younger sister Cheng Niannian, who was killed at a film set ten years ago, forcing director Lu Ming to confess his crimes in public. One murder-hunting case after another unfolds continuously: while helping departed souls reverse unjust verdicts and accumulating merit, Zhu Xiaoyu gets acquainted with Zhou Xun from the Special Paranormal Affairs Bureau. Suddenly, a new headless murder case breaks out, making Zhu Xiaoyu the prime suspect, while evil cultivation forces lurk in the shadows, waiting for an opportunity behind the unsolved mystery.