When she's 80 years old, Julia Summerwaithe decides to visit her grandchildren, Ellie and Stevie, in New York City, for the first time. She has something important to show them; in the Natural History Museum is the dinosaur she and her brother discovered on their farm in Nebraska when they were young. But even more important to Julia than seeing the dinosaur is sharing her memories of the discovery and excavation with her grandchildren. Through their grandmother's description of her rugged prairie childhood, her brother's untimely death, and the discovery of the dinosaur fossil, Ellie and Steve relive their grandmother's childhood adventures. Readers will be drawn into Julia's story, just as her grandchildren are, until her memories become more involving than modern-day surroundings.