Four-year-old Fubao follows her divorced mother and her exiled maternal relatives to a freezing frontier. Heavy snow seals off the mountains, and the family has not a single grain of rice left. Her beloved youngest uncle starves until he loses consciousness, trying to save the last of their food for his older sister and niece. Desperate, Fubao rushes into the snow to dig for roots. Her blood accidentally awakens a battered bronze mirror, and she tumbles into a modern night market a thousand years in the future.
There, she meets Xu Qinghe, who has just been betrayed by her scumbag boyfriend and best friend. She's starting over by running a stall selling accessories. A bowl of hot wontons saves Fubao's uncle, and from then on, the two worlds are bound together.
No matter how poor the Shen family is, they refuse to take anything for free. On her second trip, Fubao brings a purse embroidered by her mother and offers it as a sincere thank-you. To her surprise, modern customers scramble to buy it. Soon, purses, knotted ornaments, and little wooden rabbits are exchanged for rice, flour, cooking oil, and salt. With Qinghe's help, Fubao visits a supermarket, rides a bus, eats fried chicken, and watches cartoons for the first time. Each time, she wishes she could secretly take some home for her family.
In the ancient world, the family grows vegetables, raises chickens, bakes flatbreads, and pickles vegetables, gradually adding a little flavor to their hard life. In the modern world, Qinghe rebuilds her career through traditional-style handicrafts. Then one day, she discovers in shock that the little girl who always says, "My home is really far away," is actually from a thousand years in the past.
From then on, a four-year-old darling who looks after her ancient family and a heartbroken young woman guarding a modern secret help each other through life in their respective worlds, and slowly become a true family to one another.