There were two kingdoms, but one of the appears to have been split into two and the first appears to be about to be extinguished. The three characters are necessary to complete the healing for all of them. Interesting... This really is a complex and well built narrative. I have certain expectations and they keep being overturned and reset by the progression of the story. Two brothers at each other's throats turn into a multiple generational war. This is a lot more complicated and finely crafted than the simple summary would indicate.