Oftentimes the mistakes of our ancestors can last generations. But our ancestors don't care; they're dead.
One pony struggles to break free from a chain that binds her to a certain responsibility, a chain that was forged seven generations ago when her her ancestor gave his spear, and the spear of every firstborn in his line, to Celestia to do with what she pleased.
Loosely, and I mean loosely, based on GoW.