Fifteen years ago, the Exalt's crusade ended in overwhelming victory and he scoured the continent, enslaving Plegia and crushing the Grimleal beneath his boot. Now he rules the countries with an iron fist. Every year, Plegia must tribute their barbarians and dark mages as a suicide force for Ylisse to crush their own rebellions with. And this year includes a mysterious tactician…

Garreg Mach Academy, a very selective college with a odd ensemble of students and teachers, would prove challenging enough for Byleth Eisner, the new literature teacher - and that's without the odd shadow world and the mysterious dragon girl who resides inside it.