In 1978, Zhou Qingshan and his younger sister Xiaoman have all their family property seized by their uncle's family, leaving them only a dilapidated mountain-keeper's hut. When Xiaoman develops a high fever, their uncle even tries to snatch away their last half-bag of cornmeal. At their lowest point, Zhou Qingshan discovers a stone door in a cellar and unexpectedly travels forty-eight years into the future, to 2026. Taking advantage of the resource gap between the two eras, he sells rare mountain treasures in the modern world for money and obtains medicine and food to treat his sister. He forms a mountain-foraging team and starts a business, repeatedly foiling his uncle's family's attempts to seize their belongings and murder them, ultimately making them pay for their crimes. Zhou Qingshan builds a new house, secures stable sales channels, and starts a family with village doctor Song Zhiqiu. At last, the siblings have a safe and peaceful home.