Charles Duchemin, a well-known gourmet and publisher of a famous restaurant guide, is waging a war against fast food entrepreneur Tri- catel to save the French art of cooking. After having agreed to appear on a talk show to show his skills in naming food and wine by taste, he is confronted with two disasters: his son wants to become a clown rather than a restaurant tester and he, the famous Charles Duchemin, has lost his taste!

Jules, a young Parisian postman, secretly records a concert performance given by the opera singer Cynthia Hawkins, whom he idolises. The following day, Jules runs into a woman who is being pursued by armed thugs. Before she is killed, the woman slips an audio cassette into his mail bag…

Betty Blue, a mentally unbalanced and sexually aggressive free spirit who becomes involved with Zorg, a repairman moonlighting as a writer. The two engage in a variety of sexual encounters, and grow more passionate toward each other. Betty finds Zorg’s book and is aggressively supportive; over time, her instability begin to catch up with her, leading to a grisly and shocking conclusion.