Celestia and Luna both fought hard to establish Equestria as its own nation, and against all odds, they have succeeded. However, their kingdom is in peril.

Wendigos have returned, the dragons they brought to the peace talks have all begun to flee, speaking of an 'old cold' that seeps its way back into Equestria.

As a freezing blizzard creeps over more and more of Equestria, Luna and Celestia must face an old threat that threatens to destroy them and everything they care about.

Can they withstand the harbinger of winter?