Oh Hye-Sung (Yoon Tae-Young), who excelled at skipping rocks as a child, loved Choi Eom-Ji (Kim Min-Jung). As childhood friends Choi Eom-Ji made Hye-Sung's life warm. Ten years later Oh Hye-Sung has become a baseball player and meets Eom-ji again. She is in a relationship with another childhood friend Ms Dong-Tak (Park Sung-Min).

One day, Hye-Sung hides his injury as a pitcher and throws a perfect game. After that performance he disappears. Several years later, Hye-Sung shows up with other baseball players who have sad stories and are thought of as cast-offs. They are known as "Kyong-pyoii Woeinjudan".