Everyone would think that he lived the same way as every other human.

Yes, David did. Untill that one day, when he appeared in a strange, colorful place. He will look for anwsers to his questions: What is this place? Why did he appear here? Is there way to go back? These questions, as well as many other ones, will be anwsered in time.

But will David be welcome here? Or he would be considered as threat?