When a charming 12-year-old girl takes on the characteristics and voices of others, doctors say there is nothing they can do. As people begin to die, the girl's mother realizes her daughter has been possessed by the Devil. Her daughter's only possible hope lies with two priests and the ancient rite of demonic exorcism.
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.
Joe Buck is a wide-eyed hustler from Texas hoping to score big with wealthy New York City women; he finds a companion in Enrico "Ratso" Rizzo, an ailing swindler with a bum leg and a quixotic fantasy of escaping to Florida.
