Li Jin, a young man from a family of modern military science, accidentally traveled through time and became Zhu Fan, the third son of Emperor Taizu of the Ming Dynasty. It was the early years of Hongwu, the Northern Yuan Dynasty was watching with eager eyes, and the undercurrent in the palace was turbulent. With his forward-thinking strategic vision, he helped Xu Dabei conquer Mobei, and trained his troops to defend Peiping with his exquisite marksmanship. However, he fell into the vortex of the death of the prince due to illness and the fight between his brothers for the throne. In the face of Zhu Yuanzhang's suspicion and Zhu Di's hostility, he stuck to his heart to protect the stability of the Northern Territory. He made difficult choices between family ties and family and country during the crisis, and finally became the strongest iron wall in the Northern Territory of the Ming Dynasty.
