After three years of severe drought, Shibagou Village's life hangs by a thread. Xiao Niqiu, an eight-year-old child, jumps into a dry well and unexpectedly passes through a secret door at the bottom to reach a modern farmers' market. He trades ancient mountain delicacies for rice, water pipes, high-yield seeds, and agricultural supplies. Facing extreme drought and terrifying insect plagues, Xiao Niqiu uses modern agricultural technology to stage a dimensional reduction strike, leading the villagers in scientific farming and creating a harvest miracle of a thousand catties per mu. Eventually the secret door closes, but the entire village has already achieved food and clothing sufficiency relying on the wisdom they learned.