The disappearance of Uncle Ian at the end of the first season of Grave Robber's Chronicles was fictional and did not happen in reality. In the novel, Uncle Ian was forced to leave the team and go to the depths of Ghost City alone to find the answer because he discovered the secret of Ghost City. On the way to Ghost City, he encountered some danger and unfortunately disappeared in order to protect himself and his team. Since then, his disappearance has become an important mystery for the team. They have been searching for the whereabouts of Third Uncle. Finally, in the second season, Uncle Ian finally found the answer and successfully returned to the team.