Find the pyrophorians (0/0)

I started playing Anno 1800. At first I did not pay attention to the plot and was only engaged in the development. After many hours of play, when the development has reached the point that began to bore me decided to pass the scenario. So in the quest "Wolf in alpaca skin, where you need to find arsonists, I have 0/0 and no people with torches there. Does anyone know what to do? Played a lot of time and don't really want to load the game first.