To combat the growing problem of dragons, hunters have taken it upon themselves to track them down for a bounty linked to their extermination. Despite being perceived by his colleagues as the least competent of their profession, Ragna nevertheless allies himself with Leonica, a hunter whose skills are universally recognized. However, a tragic event prompts him to make a pact with Crimson, a dark entity determined to wipe out all dragons. But could Ragna's intense desire for vengeance lead to his downfall?