Song Yi, a modern social animal, accidentally traveled to the Zhenguan period of the Tang Dynasty. He originally wanted to live a low-key life, but because he was a top student in the history department in his previous life, he knew all kinds of historical events well. What's even more bizarre is that he has acquired a "Silent King System" - the less he speaks, the stronger his abilities are. But a twist of fate led him to meet Li Wanqing, the most favored princess in the dynasty, a unruly girl who was spoiled by the emperor. The two had been at loggerheads from the first time they met. Li Wanqing was always looking for trouble, but Song Yi could not speak at all. Unexpectedly, the more silent he became, the more curious Li Wanqing became and she insisted on forcing him to speak. In repeated confrontations, Song Yi relied on his accurate prediction of history to repeatedly perform extraordinary feats in the court, rising from a commoner to an important minister in the court. And he and Li Wanqing, a pair of happy enemies, gradually developed feelings for each other in their daily fights. But the torrent of history will not stop. The undercurrents of the Zhenguan era and the overt and covert struggles of various forces are all waiting for this pair of happy enemies to experience.