A medical student Yu Xia accidentally sees a mysterious barrage of comments, learning that she will time travel to ancient times eight hours later. She activates her ancestral jade ring space, and with her limited money frantically stocks up on grain, meat, medicine, seeds, and daily supplies. As the countdown ends, Yu Xia time travels into an impoverished widow who just lost her husband in a barren year, and also gains a three-year-old daughter Nier. Facing her vicious parents-in-law trying to sell daughters and pawn daughters-in-law, natural disasters, famines, and heavy schemes, Yu Xia relies on her portable space that can daily replenish supplies, modern medical knowledge, and the mysterious barrage warning in advance to protect her daughter, stock up grain to survive, and step by step change the fate of the mother and daughter.