"Beren and Lúthien" is a tale from J.R.R. Tolkien's legendarium, primarily found in "The Silmarillion." It tells the story of a mortal man, Beren, and an immortal elf maiden, Lúthien, who fall in love despite the challenges posed by their different natures. Their romance unfolds against the backdrop of the First Age of Middle-earth, marked by conflict and the dark power of Morgoth. The couple embarks on a perilous quest to retrieve a Silmaril, a precious jewel, from Morgoth's crown. Their journey showcases themes of love, sacrifice, and bravery, ultimately leading to significant consequences for both their worlds. The story has inspired many adaptations and remains a cornerstone of Tolkien's mythology.