In the year 1990 the Bronx is officially declared a no man's land. The authorities have given up all attempts to restore law and order leaving the area to be ruled by a gang known as the Riders. Into this wasteland comes Anne, a 17-year-old heiress to an arms business who, unable to contain her guilt over having to inherit the business, has run away. She soon finds herself under the protection of the Riders' leader, Trash. But, determined to get Ann back, executives at the Manhattan Corporation have hired a ruthless, psychopathic mercenary to infiltrate the Bronx and turn the gang members against each other.