Modern youth Ma Lingchuan relies on a mysterious pig trough connected to the ancient Da Qian Dynasty from ten thousand years ago, crossing space and time to rush to the aid of the northern border besieged by barbarian tribes. He delivers supplies to help the defending army and civilians resist foreign enemies, joining hands with the patriotic eldest princess to protect thousands of households. The story praises the great cause of home and country and the kindness and responsibility of ordinary people, keeping watch and helping each other across time and space, interpreting the precious spirit of defending the country and caring for the common people.