Modern girl Su Cha accidentally time-travels to 1960, uses her wits and stepmother Wang Cuilan to match wits and courage, protects family property, and settles down with Lu Dingbei to grow old together. After passing away peacefully of old age, she encounters the quick time-travel system "Goudan", and only then learns that her first lifetime was merely an internship test. She signs a contract to become an official quick time-traveler, with her second lifetime landing in 1971 at the Southwest Mining Company, transforming into employee dependent Su Cha—whose husband died in a mine shaft accident, leaving behind her daughter Niannian, while her husband's family plots to seize the compensation money. Moving step by step in the mine, she attracts the attention of Mine Director Feng Hongjun with her courage and literary talent. The two appreciate each other and gradually develop romantic feelings through collaboration.