The monk explains that the reason why they failed before is that they didn't have a key to the tomb. The key is in the coffin of the dead woman. The monk says that the woman wanted a place where she could gather "yin qi" , or energy, to cure all diseases. She built a temple and killed thousands of men to gather the "yin" for her experiments. Since ancient times, all tomb robbers have been killed at this place. The monks wonder if this is the equipment of the one man they met that day. The man says that it's just a trick. He says that he and his sister are both very ill because of their mistakes. They're both forced to use the ancient method of healing.