Three years ago, the dragon-slaying hero Adrian slew an evil dragon to save the realm, but was struck by a dragon curse. Since then, he became simple-minded and lost his memory, marrying into the Sinclair family as a live-in son-in-law. His wife Evelyn never left him, protecting him for three years. When the Payne family publicly humiliates his wife and the Sinclair family falls victim to dark sorcery, his suppressed mind and power awaken—he is no longer the fool others see, but the twenty-third dragon slayer of the Dragon Slaying Order. He protects his wife, seeks justice, breaks the dark sorcery, and punishes the wicked, all while tracing the secret Serpent Society behind it all. To save the land and its people, he heads to the royal capital, slays the giant serpent, cuts off the black hand, and finally breaks the dragon curse, saving the entire realm. Good and evil are repaid in the end, and when he returns, he is still a hero.
