Overview
The Drowning Pool is a 1975 American thriller film directed by Stuart Rosenberg, and based upon Ross Macdonald's novel of the same name. The film stars Paul Newman, Joanne Woodward, and Anthony Franciosa, and is a loose sequel to Harper. The setting is shifted from California to Louisiana.
Plot
Los Angeles-based private investigator Lew Harper flies to Louisiana to do a job for his former lover, Iris Devereaux. She believes the family's ex-chauffeur is the person who is blackmailing her with the knowledge that she has cheated on her husband. The husband does not care, but his mother, Olivia Devereaux, is the family matriarch and runs the family estate with an unforgiving iron grip.
Even before his investigation begins, Harper is propositioned in his motel room by a teenaged girl. He sends her away, but later he discovers that the teenager is Iris Devereaux's daughter, Schuyler. Their meeting in the motel room brings Harper to the attention of police chief Broussard and the disagreeable Lieutenant Franks. Broussard accepts Harper's explanation, but tells him he will be following what Harper does, as he has a personal interest in the Devereaux family.
Harper is abducted by two hoods working for the oil magnate J.Hugh Kilbourne, who thinks Harper might be useful in his efforts to get ownership of some of Olivia Devereaux's oil-rich properties, which she is content to maintain as bird sanctuaries. Harper is noncommittal towards Kilbourne, and the hoods return him to his car. On Harper's return, he learns that the dead body of Olivia Devereaux has just been found and the police's prime suspect is the ex-chauffeur.
From Wikipedia (CC BY-SA 4.0).