A modern young man travels through time and becomes Zhu Wen, the puppet emperor of Great Hua. The Empress Dowager, the Chancellor, and Prince Qi hold the real power in court, while various factions seek to undermine imperial authority. Facing pressure from the officials and a national preceptor who uses celestial phenomena to stir up public fear, Zhu Wen employs knowledge beyond his era to expose their false claims and stabilize the court. He joins hands with the Empress to bring peace to the inner palace, gathers capable talents, improves military weapons, and implements new policies to strengthen the nation. When his maternal relatives ally with regional princes to launch a rebellion and collude with external forces, Zhu Wen relies on modern military equipment to quell the turmoil and restore order. Using advanced ideas to transform the country, he finally breaks free from those controlling him and grows into a ruler capable of bringing peace to all under Heaven.