Unscrupulous boxing promoters, violent bookies, a Russian gangster, incompetent amateur robbers, and supposedly Jewish jewellers fight to track down a priceless stolen diamond.

A Chicago cop is caught in the middle of a gang war while his own comrades shun him because he wants to take an irresponsible cop down.

After assuming his dead cellmate's identity to get with his girlfriend, an ex-con finds himself the reluctant participant in a casino heist.