In the twentieth year of King Zheng of Qin, a young police academy graduate drowns and awakens in the body of Heifu, a low-ranking commoner in the State of Qin on the eve of its great unification wars. Armed with knowledge of the future and the rigorous legalist mindset of his past life, he must navigate a world of strict laws, noble ranks, and constant military conscription. With the Qin-Chu war looming and death on the battlefield almost certain for a common foot soldier, Heifu desperately seeks a path to survival and advancement.

A chance encounter with bandits on the shores of Cloud Dream Marsh offers a perilous opportunity to earn merit and rise from his humble station. In an era where the King of Qin’s ambition sweeps across the land, one young man must use his wits, courage, and understanding of history to carve out his own destiny, turning from a mere common ranker into a true official of the Qin Empire.