The changelings have attacked Equestria again. Nopony expected their return after their defeat during Shinning Armor's and Cadence's wedding. But return they have and in numbers so great that the daytime sky across Equestria was turned to night as they flew in a swarm. Everypony who has not been taken has sought refuge in Canterlot, the only place still standing, but for how long.

When Twilight experiences for the first time the loss of a loved one loosing control of herself in the process, what will become of the Princess of Friendship if there are no friends left?