After extensive research, Jack and William conclude that the anti-gravity material is a fragment of a meteorite that fell to Earth during the Qin dynasty. They find the location of the Qin emperor's mausoleum, concealed behind a waterfall. The massive tomb contains the strongest fragment of the meteorite, powerful enough to make the tomb a floating palace. Jack meets Ok-soo and Nangong Yan alive inside the tomb and they mistake him for Meng Yi. Professor Koo and his men enter and attempt to seize the immortality elixir, leading to an aerial fight between both parties. William accidentally breaks the balance of the field after removing a piece of the meteorite and causes the tomb to collapse on itself, and dies from drowning in mercury. While Jack is escaping from the collapsing tomb, he asks Ok-soo to come with him, but she refuses after realizing he is not Meng Yi and says she will wait for the real Meng Yi forever, believing he still lives. As Koo nears the elixir, Yan grabs onto him as they fall and presumably perish.