A young man from modern times travels back in time and becomes Prince Gao of Qin, unexpectedly awakening the ability to have his inner thoughts heard by Ying Zheng. Drawing on knowledge from the future, he carefully offers advice, helping the Qin Empire avert hidden dangers and stabilize the imperial court. Ying Zheng secretly observes and tests him, while Fusu upholds his ideals of benevolent governance and various factions quietly maneuver behind the scenes. Prince Gao proceeds cautiously, navigating the turbulent Qin court to survive and secure a place for himself.