SO gets aware that WAI has disappeared from Guangxi. Immediately she heads for Guangxi to see what has happened, and WESLEY escorts her there secretly. SO is assaulted by someone and WESLEY goes to save her right away. CHU tells WESLEY and SO how WAI disappeared suddenly. While CHU and WAI were on holiday, they met TSAI BAK, who is an old friend of WAI and a grave robber. Later WAI and TSAI met an alien with a cat in his hands. The alien hired them to rob a tomb in Guangxi, and soon after they got into the tomb, WAI disappeared without a trace. Colonel CHING LUNG, an intelligence agent working for the Chinese government, knows that WAI and TSAI have walked around the tomb, and is afraid that a flying saucer crash that happened years ago will sooner or later be leaked to the public and will in turn cause panic. He then captures CHU and waits for WAI to show up. WESLEY and SO have found TSAI, but sadly, he has gone insane……