Ada has never left her one-room apartment in her nine years of life. Her mother keeps Ada inside because Ada was born with a clubfoot. But when her brother starts venturing outside the house, Ada teaches herself to walk. When humors of Hitler bombing London, Ada escapes with Jamie, her brother, to the country.
Ada and Jamie are taken to live with Susan, who really didn’t want kids. While with Susan, Ada teaches herself to ride a pony, Buttercup. She also learns to read with the help of Susan. She also begins to trust Susan and over time, Susan begins to care for Ada and Jamie. When Ada and Jamie are taken back to London with their mother, will they ever see Susan again and can they make it through the war?