"The Runaway Piano" by Eugenie Summerfield is a short story about a piano that escapes from a music store and creates chaos in the town. The piano travels through the streets, leaving a trail of destruction, until it is eventually stopped by a brave girl named Lily. Lily manages to stop the piano by playing a beautiful melody that calms it down. The story ends with Lily being praised as a hero and the piano finding a new home in her house, where it is played and appreciated every day. The story explores themes of determination, bravery, and the transformative power of music.