Lin Qinghe, a Ming history expert at Fudan University, unexpectedly collapses during a lecture. When he wakes, he discovers he has transmigrated into Zhu Xiongying, the eldest legitimate grandson of the Hongwu Emperor in the fifteenth year of the Hongwu reign: a ten-year-old child who “died of illness” in history. But this time, he awakens with modern memories amid the interwoven strands of two timelines. In the modern timeline, he lies in an emergency room, where a CT scan reveals an eerie blue-and-white porcelain dragon pattern in his brain. In the ancient timeline, Zhu Yuanzhang seals off the Eastern Palace, as a court plot to poison him begins to emerge. When a dragon-patterned jade pendant grows warm in his hand, when Jinyiwei agents secretly visit in the dead of night, and when the great general Lan Yu barges in carrying The Art of War for a Hundred Battles, Zhu Xiongying gradually realizes that history has already veered off course, and every choice he makes is rewriting the present six hundred years later. This is no simple transmigration, but a profound struggle over fate, power, and the cost of civilization. Zhu Xiongying must choose between slaughter and mercy: either become the one who drives history forward, or become the wheel of history.