For years, the Sablum Empire has been striving to conquer Windland, and currently, they are strategizing alongside mercenaries Sister Hell and Darkness Knight to launch a fresh assault, employing Angels, formidable magical creatures. Hyaweh, a skilled but easy-going swordsman, and Priecia, potentially the missing royalty of Windland, enroll at the Knight's Academy in Windland to sharpen their swords and magic. They encounter numerous comrades and supporters who can assist them in safeguarding their country against the forthcoming attack.