Follow the story of a boy named Arven as he seeks to join the legendary hunting faction: The Scarlet Blades with his best friends Ferran and Seravanna. Amidst the turmoil that befalls his village, Arven is separated from his friends and is forced to join the faction alone. During his time with the other hunters, he does what he can to find his friends, but throughout his journey, he is constantly crossing paths with a demon named Xion who is tasked with training Arven in order to prepare him for his "true purpose in life." With the demon offering no hints as to what that purpose is, Arven is forced to fight for the life he wishes to live instead of the one that is chosen for him.