Equestria is an untamed land.
Despite ponies' feelings of security within their towns, vast swathes of the nation remain wild, dangerous, and filled with horrible beasts with little interest for friendship and cooperation. Many creatures make it their job to defend others from these creatures--Sapphire, a Dracony and member of the Order of the Azure Star, is one such creature.
Called to a small mining town in dire need of her help, it is her job to defeat the beast that lurks in its forests and bring the townsfolk some peace of mind.
See art of the main character (Sapphire) here, for better visualization. Done by the same artist as the cover page: https://imgur.com/a/sb2Vzv8