Sen, the last dragon, fought humans until the end. Defeated by a powerful witch, he died vowing revenge for his kind. Fate gives Sen another chance when he is reborn as Ray Talen, though now in a weak human body. Despite his anger toward humans, his new parents slowly earn his affection. When Ray’s father falls ill with the mysterious Shadow Plague, Ray looks to Avrion Academy for answers, hoping to find both revenge and a cure. Ray’s quest to become a knight at Avrion Academy starts. Meanwhile, gains a powerful system which grants him abilities and powers that he used to have in his past life as a dragon. As Ray learns to use it, he also wrestles with his identity as both Ray and Sen. Ray remembers life as a dragon, but now faces human limits. Will he choose compassion, or yield to his old anger? His journey weaves through academies, hidden powers, and deadly trials. Each step tests whether a reborn dragon can find purpose in humanity—while still seeking justice for a world that betrayed him.