While visiting Pikesville, New York, the Boxcar Children join the exciting last games of the season in a strange old ballpark. The Pikesville Half Moons are playing the Eagles, but the Eagles seem to be hitting far too many home runs.

Gertrude Chandler Warner was born in 1890 in Putnam, Connecticut, where she taught school and wrote The Boxcar Children because she had often imagined how delightful it would be to live in a caboose or freight car. Encouraged by the book's success, she went on to write eighteen more stories about the Alden children.