Jiang Mengwei, a fake heiress expelled by a wealthy family, takes over her grandfather's mountain village grocery store and accidentally discovers that the store can connect to different ancient times and spaces in the evening. Using modern supplies such as instant noodles, medicine, and seeds, she helps starving children and a princess in the cold palace, and engages in cross-time-and-space trade with an ancient young lord and a merchant woman. When harassed by covetous villagers, she saves a severely injured dark guard to protect her own safety. She exports agricultural technology to assist ancient court reforms, saves people and the world with modern supplies, and ancient treasures help her accumulate massive wealth. In the end, Jiang Mengwei shakes off the shadow of the wealthy family, takes root in the mountain village, reaps wealth and career, and also possesses precious friendships that cross time and space.