In the continent of Aras, where dragons and knights live together, the young knight Lan Aegwen encounters the mysterious young dragon Casta, and becomes involved in the intricate conflict between the kingdom, the dragon clan and the dark forces. As he grows up, Lan meets his companions, reveals the secrets of his family and kingdom, and experiences multiple processes of loss and humor, intrigue and salvation. The three-volume story shows the bond, adventure, humor and ups and downs of fate between knights and dragons from multiple angles. In the magnificent war and reconciliation, the truth about the conflict between dragons and knights is revealed, allowing them to grow, revive their country and protect their faith.