Penelope Flug, a plain, ultra-conservative junior editor, who views sex as bland as steamed tofu, is assigned to write a compilation of sexy memoirs of one retired madam with over a thousand sexual exploits to her credit. The madam claims that the red thongs she wore drove men wild and suggests Penelope purchase a pair to boost her uneventful sex life. Will Penelope take the madam's advice or continue her humdrum sex life?