Five years ago, Rosalind Duvall was beaten by the police during a riot. Staying on the straight-and-narrow path, however, has done little in gaining recognition as an artist. Reluctantly, she turns to the walls of the city to have her voice heard. Jeff Allen's job as a police detective is to look for signs of gang activity, including graffiti. These new paintings, however, do not fit his ideas of typical gang work. With the help of a young female officer, college professor, and a local artist with intimate knowledge of the graffiti, he has to find out who would take the time and go to all the trouble of painting the walls of the city.