Cadance didn't know what to expect when her formerly banished Aunt Luna returned from her thousand year imprisonment in the moon. But, she's quite entertained by the hilarity.
After half of Twilight's mane gets ripped off, she decides that it's time to visit the Author of All Beings in order to give herself a sparkly magical mane, just like Celestia. One problem: the Author of All Beings is a massive jerkface.