On the cusp of becoming teenagers, Ralph, his sister Shelley, and their friend William, befriend Danielle, an odd girl in their school. She draws an extraordinary horse in a competition created by Ralph's mother. It's the kind of drawing no child -- or adult, for that matter -- should be able to draw. It will haunt Ralph into adulthood, because it represents everything wrong in Danielle's life and everything she wished her life could be. As teenagers and later adults, Ralph, Shelley, and William are struck, trying to figure out what the horse means to the girl, and how they can help.