Thirteen-year-old Rosie Beckett has never strayed further from her familys farm than a horse can pull a cart. Then a letter from Aunt Euterpe arrives, and everything changes. Its 1893, the year of the Worlds Columbian Exposition — the wonder of the age — otherwise known as the Chicago Worlds Fair. Tucked inside the pages of the letter are train tickets to Chicago, because Aunt Euterpe is inviting the Becketts to come for a visit and go to the fair! For Rosie, its a summer of marvels — a summer shell never forget.
In 1893, thirteen-year-old Rosie and members of her family travel from their Illinois farm to Chicago to visit Aunt Euterpe and attend the Worlds Columbian Exposition which, along with an encounter with Buffalo Bill and Lillian Russell, turns out to be a life-changing experience for everyone.