Amelia and Rory Pond, reunited in the 1930s, are expecting a baby. They rejoice the fact that the chance came and a healthy girl is born. Elthia Pond grew up about 80 years too early. She was told and retold about this Doctor, but the only doctor she knew was her dad. Finally, she runs into the elusive Doctor, fitting the exact image of the stories. Anxious to learn more, Elthia hitches a ride into her own century, but what happens when the Doctor finds out about the new Pond?