The book tells the story about a little red horse who worked at the subway, transporting passengers across town. One day she became sad and her color slowly began to fade. She would probably lose her color completely, had she not met a boy who always dreamed about having a real horse. This book is about the importance of making someone happy and sharing the joyful moments together.
Some parts of the book include tracing paper inserts—flipping through which makes the illustrations come to life.