People who want to become Legions have an Armament with a star rarity that defines one's magical capabilities. Eden Alistar is a sixteen-year-old boy who lives in the Kingdom of Basintroll. He lived his whole life as a fisher but always dreamed of exploring the world outside as a Legion, saving people from monsters known as Menaces. Then he finally gets the chance he waited so long for; the day of his summoning, Eden reaches into the void. Light and wind blast out of the portal as he pulls a sword and a shield with a gray eight-pointed star on it. A One Star. Everyone laughs at him, calling him names and insulting him. Enraged, Eden slams his blade onto the ground, silencing the crowd. Then swears to everybody that he will become The True Hero of Legend and prove to everyone that a One Star can also be a Legion.