Under the prosperous modern civilization lies the forgotten ancient scale tribe. Thousands of years ago, the Scale Clan ruled the earth, and their blood contained the power to destroy the world. The human coalition paid a heavy price to seal them away, and their mixed-blood descendants were scattered around the world, burdened with the innate sorrow of blood - half human and half scale. They could not fully integrate into the crowd, and could be swallowed by the ancient beast nature in their bodies at any time.
"Jindai Academy", a secret academy disguised as a noble academy, is specifically looking for these mixed-race teenagers. On the surface, the academy teaches history and alchemy, but in reality it trains dragon slayers. They learn to interpret the scale script (similar to the word spirit), forge alchemy weapons, go deep into the "sunken ruins" (Nibelungs) of distorted space, and hunt down the scale statues that wake up one after another.
Lu Xun, an ordinary boy, was originally a silent and marginalized person in the crowd. A sudden invitation broke his ordinary life. He entered Jindai Academy, met his companions, and stepped into dangerous ruins to perform missions again and again. He gradually discovered that the truth about dragon slaying was not black and white. The mixed race and the scale race had the same origin. When the ancient scales are broken one after another, the whole world will be involved in a fateful fight. The young man must choose between human nature and animal blood, fight against fate, protect his companions, and face the massacre and curse that has lasted for thousands of years.
