The Great Yin Dynasty is beset by internal and external crises. The northern barbarians are eyeing its borders, while undercurrents swirl among the factions at court. A modern young man unexpectedly transmigrates as Xiao Yi, the most doted-on youngest son of the Minister of War’s household. On the surface, he’s a spoiled wastrel who never applies himself. In truth, he bears the heavy responsibility of changing his family’s fate and the course of the dynasty. At his side are also several beautiful older sisters, each with her own unique charm.