The question is, what are those people doing in that place? Are they looking for something?
David wanted to know about this and because of this he controlled the emperor to follow those people.
But it looks like he would not be able to follow those people for that long. If you want any reason then those people are currently going deeper inside the danger zone.
Now going inside the danger zone would be very dangerous for him. David currently has two choices: one is to follow those people, one is to retreat from this place.
Even though the emperor will face danger, it was just a game so the real David would not receive any kind of impact.
But the problem is that did he really want to follow those people? David took some time to decide about these and finally he decided to follow those people.