A modern young man time-travels to the 25th year of Hongwu in the Great Ming Dynasty and becomes the Third Imperial Grandson Zhu Yuntong. Standing out in the torrent of the late Hongwu era, he becomes Zhu Yuanzhang's favorite grandson, accompanying and assisting the founding Emperor Zhu Yuanzhang in developing agriculture and technology, improving people's livelihood together and eradicating corrupt governance. He lets the elderly Zhu Yuanzhang let go of his past emotional knots and feel the warmth of family affection, and the grandfather and grandson create a new generation of the Great Ming Glorious Age together!