Tough narcotics detective 'Popeye' Doyle is in hot pursuit of a suave French drug dealer who may be the key to a huge heroin-smuggling operation.

An out-of-work newspaperman in need of money becomes the go-between for a jewel thief and an insurance company that wants to settle.

Two New York City cops investigate a drug-smuggling ring that they believe is run by New York-based foreign diplomats.