Graffiti is writing or drawings made on a wall or other surface, usually without permission and within public view. They can range from simple written words to elaborate wall paintings.
Graffiti has existed since ancient times, with examples dating back to ancient Egypt. Nowadays, graffiti are everywhere, and they come in every size and color.
Some people regard it as aggression and crime. Considered a form of vandalism, defacing property with graffiti is anti-social behavior and punishable by law.
Others, however, see graffiti as a form of artistic expression. The question, however, is who are the graffiti artists? This documentary follows some of these artists into a new urban guerilla war.