In early 1976, Zheng Weimin, a modern orphan, traveled through time and became an abandoned son of a military officer's family, replacing his younger sister in Xujia Village, Beiyuan. He endured hunger and cold, and won the trust of the village party secretary Xu Zhiquan and the warmth of the villagers by telling historical stories, growing potatoes, and promoting silage. He fought side by side with the princess Yunfang and repeatedly thwarted the villain Chen Donglai's frame-up. In the 1977 college entrance examination, he ranked second in liberal arts in the Huangyuan area with a score of 317, and was admitted to the History Department of Peking University. Before departure, he stayed in the village to celebrate the New Year and waited for his return to Beijing in the spring with a notice.