Set on the continent of Elibe, the story follows Roy, the young son of famed knight Eliwood, as he inherits command of the Lycian army amidst a surprise invasion from the neighboring kingdom of Bern. As war breaks out, Roy uncovers a deeper plot involving ancient dragons, corrupted kings, and a divine weapon known as The Binding Blade. Roy must unite the nations of Elibe, grow into a true leader, and challenge Zephiel, the king of Bern, whose hatred of humanity drives him to resurrect the demon dragon Idunn.