en Cuevana 3. During an investigation into a mass murder with links to a doomsday cult, Officer Chan reluctantly enlists police occult expert Officer Chiu to help him solve the case. But during their investigation of the cult and its charismatic leader The Pope, they realize the killings may be related to a previous serial murder case, their own pasts, and the psychotic hypnotists in charge of it all may be preaching some truth...