Modern mechanical talent Yang Liu time-travels to become an educated youth of the same name going to the countryside in 1972. The original body was exploited by her biological mother and stepfather, her job was stolen by her step-sister, and she was forced to go to the countryside. After arriving at Lingshan Brigade, Heping Commune, Longping County, Heilongjiang Province, she turns the tables with her great strength, modern mechanical knowledge, and the "Myriad Realms Trading System", fights against toxic relatives, builds warm greenhouses, raises rabbits, plants medicinal herbs to lead villagers to increase income; designs small electric carts, agricultural machinery and home appliances, and becomes a machinery factory consultant; cooperates with the public security to catch traffickers, uproots dark dens, and roots out secret agents. She and Shen Huanbai know and stay with each other, helps Zhou Erya uncover the truth of the fake and real daughters, and finally walks out of the Lingshan Brigade, enters the Ministry of Machinery in Beijing, and ushers in a new life of career and love.