Given the question: Build a movie plot around this: Where Did Agnes see Mona Mars? Agnes saw Mona Mars near a town called Realito behind an auto shop.
The answer is:
Private detective Philip Marlowe (Humphrey Bogart) is summoned to the mansion of his new client General Sternwood (Charles Waldron). The wealthy retired general wants to resolve gambling debts his daughter, Carmen Sternwood (Martha Vickers), owes to bookseller Arthur Gwynn Geiger. As Marlowe is leaving, General Sternwood's older daughter, Mrs. Vivian Rutledge (Lauren Bacall), stops him. She suspects her father's true motive for calling in a detective is to find his young friend Sean Regan, who had mysteriously disappeared a month earlier.Philip Marlowe (Bogart) and Vivian Rutledge (Bacall) square up to each other.Marlowe goes to Geiger's rare book shop. Agnes Louzier (Sonia Darrin), Geiger's assistant, minds the shop, which is the front for an illegal operation. Marlowe follows Geiger to his house, where he hears a gunshot and a woman scream. Breaking in, he finds Geiger's body and a drugged Carmen, as well as a hidden camera with an empty cartridge. Marlowe picks up Carmen and takes her home. He goes back to the house, but discovers the body is no longer there. Marlowe later learns that the Sternwoods' driver (Owen Taylor) has been found dead, with his car driven off a pier.Vivian comes to Marlowe's office the next morning with scandalous pictures of Carmen she received with a blackmail demand for the negatives. Marlowe returns to Geiger's bookstore, where they are packing up the store. Marlowe follows a car to the apartment of Joe Brody (Louis Jean Heydt), a gambler who previously blackmailed General Sternwood. He returns to Geiger's house and finds Carmen there. She initially claims ignorance about the murder, then insists Brody killed Geiger. They are interrupted by the owner of the home, small-time gangster Eddie Mars (John Ridgely).Marlowe follows Vivian to the apartment of Joe Brody, where he finds Brody armed, and Agnes and Vivian initially hiding. They are interrupted by Carmen, who wants her photos. Marlowe keeps the pictures and sends Vivian and Carmen home. Brody admits he was blackmailing...