Elowen, the fallen princess of the Water Dragon clan, marries the heir of the Wind Dragon clan to fulfill her grandfather's dying wish—only to be humiliated by her husband and the dragon nobility, while her loyal guard Kael is imprisoned and tortured. No one knows that she carries the bloodline of the Primordial Thunder Dragon and wields the Scales of Justice. At her breaking point, she leads her Dragon Shadow Legion in a fierce counterattack, exposing the Fire Dragon clan's illegal breeding of hybrid warriors and the conspiracy of the four noble houses to commit treason. The villains are brought to justice; her husband is stripped of his dragon blood and reduced to a beggar on the streets. In the end, Elowen, by virtue of her Primordial bloodline and heroic deeds, is elected by the entire dragon race as the Supreme Arbiter, holding the power of law and judgment. She rejects romantic entanglements, and together with Kael—who becomes a Dragon Soul Knight—she steps into the unknown abyss, continuing her legendary journey to protect the dragon race.
