With their investigation, they finally found the origin of the Fierce Ghost, which surprisingly was related to a tomb robbery that had occurred near a lake a week ago. At that time, the Tomb Raiders, unable to open the sarcophagus, had used a crane to pack and take it away.
When the male and female protagonists found the group of Tomb Robbers, they discovered they had been dead for over ten days; their bodies were stinking and decaying, and the coffin had already been opened, with nothing left inside.
At this point, the movie had reached its final stage.
The protagonists deduced from some relics left in the ancient tomb that the origin of the Fierce Ghost was that of a princess from an ancient country, a very famous one, who had killed herself en route to a diplomatic marriage.
So, they decided to head to the princess's ancient Imperial Residence, now a modern tourist area, to place the coffin there, allowing her to return to her homeland.