The only eyewitness to the death of Old Charlie, brought on by a taunting joyrider who harassed him, is young Marly Devon, who teaches at a daycare center. Jill remembers Marly from a previous assignment, and that she functioned at a seven-year-old cognitive level. Thanks to experimental therapy (including a special diet and megadoses of vitamins) and longtime counseling, Marly is now of almost normal functioning. But will she make a credible witness, especially when side-effects of her treatments begin to show?