Paul Kersey is again a vigilante trying to find five punks who murdered his housekeeper and daughter in Los Angeles.
Millions in diamonds are stolen from a New York City safe, and later the burglar is killed. Shamus is paid $10,000 by the owner to find the diamonds or the killer.
A boozing young man in love with his co-worker finds that everyone around him, even his pompous and condescending best friend, is changing into a rhinoceros.