Amid the chaos of war and famine, eight-year-old Sang Duo's father is gravely wounded while protecting the family's grain. Desperate to borrow money, she suffers humiliation before accidentally falling into a mountain ravine. However, the blue floral cloth bundle left behind by her mother transports her to a modern-day marketplace. The wild mushrooms that nobody in ancient times cares about turn out to be worth enough to buy life-saving medicine and food! Traveling between the two worlds, Sang Duo sells mushrooms to save her father, learns new skills under a master, and leads the villagers in growing mushrooms to build their wealth. Facing harassment from greedy relatives, the covetous schemes of unscrupulous merchants, and raids by bandits and soldiers, she and her family protect their secret, build irrigation channels and mushroom sheds, and safeguard the livelihood of the entire village. On New Year's Eve, as the family reunites, an eerie glow suddenly appears in the mushroom fields, mirroring the mushroom patterns on the cloth bundle. The secret of the cloth bundle is only just beginning to unfold.