Thunder on a rainy night broke through the barriers of time and space. When Chen Mo, a modern warehouse manager, was inspecting the warehouse, he accidentally discovered a mysterious light hole with a light blue halo. When he was sucked in by an invisible force and opened his eyes again, he was already in an alleyway of the Tang Dynasty paved with bluestones - under the moonlight of the seventh year of Kaiyuan, villagers wearing rough cloth, soldiers with bright armor, simple tile-roofed houses and curling smoke from cooking stoves formed a heart-stoppingly real ancient picture.
As the night shift manager of Hengtong Warehouse, Chen Mo never thought that the modern logistics warehouse he was responsible for would actually hide a secret passage connecting thousands of years of time and space. On the other side of the light cave is a village in the Tang Dynasty where drought is raging and the people are living in poverty. He is hungry and cold and is taken in by the kind-hearted barefoot doctor Granny Wang. However, because of his strange clothes and the lighter that "makes fire out of thin air", he is hunted down as a "demon".
In a desperate situation, Chen Mo discovered that the light cave was actually a two-way passage. The mountains of supplies in the warehouse became his confidence: snow-white rice alleviated the hunger of the villagers, cold medicine cured the child's cough, improved seeds emerged from the barren land, and simple irrigation equipment led to life-saving river water. He carefully traveled back and forth between the two worlds, using modern knowledge to improve ancient life, but he did not know that he had quietly changed the trajectory of history.
However, the well-intentioned help soon led to crisis.
