From the back of the book:
New York City is in a constant state of chaos under the thumb of organized crime. The heroes are faced with an opportunity to stem the ever-growing tide of violence once and for all. How much are they willing to sacrifice to achieve their goal of cleaning up the streets? Is it worth their reputation and the lives of those they hold most dear?
Street Wars is a full-length campaign for a small group or single player adventure for the Classic Marvel Superheroes RPG. This book contains everything you need to play a street level campaign set on the mean streets of New York City, including a multichapter adventure book, maps, Player Characters and NPCs.