This was a time when dragon power was considered original sin. Allen, the illegitimate son of an aristocrat, not only failed to awaken during his coming-of-age ceremony, but it was also revealed that he had the blood of the enemy flowing in his body, and he became an outcast from the world in an instant.
In the Swamp of the Undead, which is filled with the rot of death, a group of refugees who were also crushed by the war regard his walking corpse as their only hope. In response to those eyes that even living was a luxury, Allen picked up the broken armor and vowed to build a territory for them where they could breathe freely. When the refugees used blood-stained linen and thorns in the wild to sew the first battle flag for him, the "dragon and thorn flag" became the most unyielding declaration of this era and the most annoying thorn in the eyes of the kings of the old world.
However, his former brother, the youngest "Dragon Slayer" in the empire, was leading the iron hoof of judgment across the continent. All those who harbor the "dragon's seed" will be purified by the flames of holy war. In the desperate pursuit, Allen was forced to uncover the taboo seal deep in his bloodline, and exchanged his humanity for the power to subvert the war situation.
He protects more and more people, but he gets closer and closer to the abyss. Until on the final battlefield, when he was about to burn the enemy with dragon flames, he saw the children under his protection trembling in the fearful eyes of the enemy general.
At that moment, he realized that the real decisive battle was not outside the city, but inside.