The history and descent of the main characters are given as the leading paragraphs of the book, and the back story is elaborated upon in The Silmarillion. It begins five hundred years before the action of the book, when Morgoth, a Vala and the prime evil power, escapes from the Blessed Realm of Valinor to the north-west of Middle-earth. From his fortress of Angband he endeavours to gain control of the whole of Middle-earth, unleashing a war with the Elves that dwell in the land of Beleriand to the south.