Dave Toma poses as a cop hating misfit to get close to a young sniper barricaded atop a building in the crowded section of the city. Armed with guns and grenades, Billy Haskell is taking shots at citizens from his fortress in a downtown section. As Inspector Spooner is about to order police in a helicopter to dispose of the sniper, Toma persuades the inspector to let him join Billy in the guise of an ally. The plan backfires when Toma, pretending to be a hate-ridden social rebel, is dismissed as a freak by Billy, who ties him up to keep him out of the way.