The Dual-World Wholesaler

Chloe travels to the Famine Years and becomes a widow. Bound to a Dual-World Portal system, she shuttles between the modern world and the Famine Years, trading grain for antiques to earn money to save her grandmother and raise her two children. She drives away villains, unlocks the black market to trade for treasures, and ultimately uses her modern knowledge to help the villagers dig a well, becoming the entire village's great benefactor.