A Zhe was originally a top live-streamer with millions of followers. A sudden car crash, however, caused him to time-travel back to an ancient dynasty, where he became the third prince—an unsupported and considered "useless" prince. When he learned that the dynasty was facing imminent destruction, he relied on modern wisdom to create guns and cannons, successfully fending off foreign invaders. Nevertheless, the crown prince and the second prince regarded him as a threat; relying on his own sharp mind, he successfully toppled both of them and securely seated himself upon the throne.