Being born completely apart from the family line of unicorns is one thing. But when Emerald Frost, a Pegasus that is able to manipulate arcane energy much like a unicorn, leaves town after having enough of being treated like a freak of nature, he realises that he is the only one that can counter what that town has produced. Returning there, the pony gets swept up in a problem much greater that he can imagine, and that a sweet mare makes solving those issues that much harder.