Ordinary supermarket owner Lin Yan is facing life difficulties when he accidentally discovers an old iron door in the warehouse that can lead to a fictional ancient dynasty plagued by war and famine. At that time, the capital of the dynasty was deeply trapped in crisis, and the common people and soldiers suffered from hunger and cold. Empress Chu Qingyue led everyone to stick to it bitterly. Lin Yan, with a benevolent heart, used modern daily necessities, agricultural knowledge, and practical equipment to send food to the local area, improve farming conditions, and help the people resist disasters and wars. The two trust and support each other through one difficult time after another. Lin Yan also completes his self-transformation in this wonderful experience, and the lives of the two worlds are thus intertwined together.