Arthur Wells, the Dragon Emperor of the Hidden Dragon Palace, retires to be a food delivery rider. When a female CEO, Luna Kingston, is kidnapped, Arthur rescues her and they have a one-night stand. Due to the misunderstanding, Luna proposes a marriage. Although the public laughs at Arthur’s low social-economic status, he secretly helps Luna fight against the enemies and the Song Family. Finally, the two live happily ever after, just like an ordinary couple.