A mail-mare has gone missing in the Everfree Forest, and it is up to her co-worker to find her. Two brothers and a mysterious old ranger have set out to search for the lost mare. Little do they know of the forces that are at play...
Legend says that little ponies who don't honor the spirit of friendship on Hearth's Warming Eve will draw the attention of a beast who will take them away forever. Tonight good fillies should hide their heads... because Grogar is coming to town.
When the deposed king of the Diamond Dogs is brought before the court of Celestia, the story he tells is far too much to believe. For if it is true, the Equestrians' conquest of his nation has been a terrible mistake.