From the introduction:
The Arthurian legend, the body of stories and medieval romances, known as the matter of Britain, centering on the legendary king Arthur. Medieval writers, especially the French, variously treated stories of Arthur’s birth, the adventures of his knights, and the adulterous love between his knight Sir Lancelot and his queen, Guinevere.
You're going to spend ten years here, though it might not be the one most are familiar with. Maybe you're landing in the legend of a quest for the holy grail and will end up helping Arthur on his quest after meeting Tim The Enchanter. you might even end up meeting the good king and his annoying sword who just makes you rage. No matter what setting you pick, you'll be in for a wild ride.