Voluptuous and sexy Red Marsden doesn't know why she agrees to hide in the house of a former lover and observe the antics of his wife. Perhaps it's because she has a bottomless curiosity in matters sexual. At any rate, what she observes and feels becomes a focus of the resulting investigation. She witnesses a woman in the grip of sensual possession and she too is sucked into the mystery of Burning Desire - an account of sexual haunting and a phenomenon classified as Top Secret. Until now...