Detective Philip Marie's hired by an old general to stop a blackmail plot concerning his daughter, Carmen. A series of clues puts Marlowe in touch with several seed people. Soon, Marlowe is involved with another of the general's daughters; Vivian. This leads to love, a divorced beauty. She and romance and her double-crossing him.m. Everyone, including the DA, warns Marlowe to stop the investigation, but he can't. Marlowe decides to set up a trap for person who's responsible for all his troubles..