An unexpected visitor breaks Celestia's nightly peace.

Celestia and Twilight go off on their own business, leaving Cadence and Luna, who haven't really gotten to know each other all the well, to find their own things to do.

A second Changeling invasion has brought Equestria to it's knees. The Princesses only have one option: seek external help.

On her way to the country of Stalliongrad for a meeting, Princess Celestia's helicopter is supposedly downed by a blizzard. Princess Luna must resume her sister's role as Equestria's leader, unknowing that a force larger than her is at play.