WELL
I'd rather not give too much away, but this is what Drakengard is about, on the very surface:
It's the Union (the "good guys") against the Empire (the "bad guys"). Your main guy, Caim, has gotten both of his parents killed by a dragon, but still fights, because he has to protect his sister, Furiae, who is the chosen Goddess. As he's fighting his way to her, he gets mortally wounded, but "stumbles" upon a dragon, who is also dying. Caim knows that if he makes a "pact" with this beast, it can save both their lives, and also give them the strength to fight, and possibly defeat the Empire, and save Furiae. So, even though Caim despises dragons, he puts that aside to help others (or also to continue trying to fill his bloodlust, however you want to look at it), and they start out and this quest, which, obviously, turns into something much, much larger and more interesting.
AND IT'S PURE GENIUS AND I LOVE IT.
You should too.
