A modern special forces soldier crosses over to become the crown prince's body double in the Daqian Dynasty. The original crown prince dies a debauched death, and he is forced to take his place. Facing the framed plots of the third prince and Duke Zhenguo, he breaks through step by step with modern wisdom, resolves life-and-death crises such as blood-dripping kinship tests and palace autopsies, reorganizes the Jingzhao Prefecture, redresses wrongful convictions of loyal officials, rallies various factions, and shatters the rebellion conspiracy of the imperial relatives. From a body double surviving in the cracks, he gradually takes charge of the imperial court, ascends the throne as emperor, and guards the realm of Daqian.