After transmigrating to the Great Qian Dynasty, he becomes the little prince most cherished by his crown prince brother and his father, the emperor. He had thought he could spend his whole life as a carefree young noble, but an upheaval destroys everything. Within the realm, powerful ministers command vast armies and covet imperial power; beyond its borders, the Hu people lay siege to the capital. From then on, Xiao Yu transforms into a “tyrant” of his age!