From NetFlix:

Love, sex and deception rule the day in this psychological drama from director Ray Lawrence. Detective Leon Zat (Anthony LaPaglia) dives headlong into a missing-persons investigation just as he’s grappling with guilt about his extramarital affair. His case crisscrosses the lives of four couples, all of which have secrets — including Leon’s wife, Sonja (Kerry Armstrong), and her secret psychiatrist, Dr. Sommers (Barbara Hershey).

“1001 Films To See Before You Die” points out that this film is very Australian in tone and deed. In fact the actors are Australian. It was the first time we had ever seen Anthony LaPaglia (now appearing in the TV series “Without a Trace”) who is at the center of the film. He was born in Adelaid, South Australia.

The film is a “Crash” film, meaning that many plot threads interweave just as “lantana” is an Australian creeper bush with flowers on top but a mass of sharp, nasty branches underneath.

One detail that I always remember is that LaPaglia has stolen a tape recording of one of his wife’s psychiatry sessions in which the therapist asks her if she loves her husband. He is so guilty about having an affair that he cannot bring himself to listen to the answer. You will have to see the film to hear the answer.