The world of dragons is like a deep iron curtain, and the secret party's understanding of them is only a distant glimpse through this iron curtain. Lu Mingfei, who refused the deal with the little devil, returned to the story after the whole world was restarted. At the beginning. But the retained memories failed to make the future clearer. What awaited him were events and mysteries that had never happened one after another. The shadow of the secret hybrid organization and the secret party lasted for thousands of years. The dragon-slaying family, the key to ascending the throne as a dragon... The gears of destiny are re-operating in a new way, all the chess pieces are on the field, and no one can escape. '... The world line has been changed.'