After his wife is murdered by street punks, a pacifistic New York City architect becomes a one-man vigilante squad, prowling the streets for would-be muggers after dark.

New York private eye Shamus McCoy likes girls, drink and gambling, but by the look of his flat business can't be too hot. So an offer of $10,000 to finds some diamonds stolen in a daring raid with a flame-thrower is too good to miss. His investigations soon get pretty complicated and rather too dangerous. At least along the way he does get to meet Alexis.

On the eve of her 17th birthday, Mari and friend Phyllis set off from her family home to attend a rock concert in the city. Attempting to score some drugs on the way, the pair run afoul of a group of vicious crooks, headed up by the sadistic Krug.

A young college student researches sexual deviancy by placing ads in underground newspapers.