Si Eun, born in Jeju Island grew up with horses. Especially a horse, Chundoong who lost his mother and Si Eun take care of each other. Si Eun also lost her mother so she feels a deep sympathy for Chundoong. One day, Chundoong is sold by someone and they have to be separated. 2 years later, Si Eun accidently bumps into him. With Si Eun's special care, Chundoong becomes a race horse and they join a race competition together.