To save a thousand-year-old red snake weeping and awaiting slaughter at the market, Aying spends all her silver meant for her mother's medical treatment, drawing mockery from the entire village. Little does she know, the red snake is a spiritual snake come to repay the kindness. It offers a herbal remedy that cures Aying's mother's chronic illness of over a dozen years within seven days, and guides Aying to reclaim barren rocky land neglected by everyone, planting corn. Amid widespread famines, the corn sells for an astronomical price, lifting the poor family out of poverty overnight. But the envious Wang Dabiao harbors evil intentions, and a crisis quietly approaches.