The unnamed narrator describes the qualities of Ligeia, a beautiful, passionate and intellectual woman, raven-haired and dark-eyed, that he thinks he remembers meeting "in some large, old decaying city near the Rhine." He is unable to recall anything about the history of Ligeia, including her family's name, but remembers her beautiful appearance. Her beauty, however, is not conventional. He describes her as emaciated, with some "strangeness." He describes her face in detail, from her "faultless" forehead to the "divine orbs" of her eyes. They marry, and Ligeia impresses her husband with her immense knowledge of physical and mathematical science, and her proficiency in classical languages. She begins to show her husband her knowledge of metaphysical and "forbidden" wisdom…
(Excerpt from Wikipedia)