Nothing is ever black or white, purely good or evil. Even the most atrocious events in our human history have personal stories beneath them. This is the story of two people deeply affected by the events of that day.
How historical fiction can show us the fallacy of black and white, good and evil, right and wrong.
Merlin? King Arthur? It's been done, too much you say. But if you have not read M. K. Hume's take on the legend you are missing out.