What is the main conflict in Dragons of Autumn Twilight by Margaret Weis?

Dragons of Autumn Twilight by Margaret Weis is the story of a set of companions that meet for the first time in five years after going their own way. They are quickly drawn into a war that they didn't even knew existed. They struggle to find the truth of the long forgotten gods and the way to free their land of the dragons that threaten to destroy them all.