Cadence and Shining armor have been married for ten years. (They are not in this story.) Now the changelings are back.
Luna was waiting for her lover, Inferno, when they came.
Now Luna and Celestia have been exiled from Canterlot by none other than Queen Chrysalis. Luna give birth shortly after, and the identity of the father remains a mystery to Celestia. In her foalhood, Comet, one of the daughters of Luna, discovers a dangerous power…
And she must use it to save the one of the only ponies left in her family. Dusk.

Chrysalis returns because I suck at Alternate Universes. :)