The Lord of the Rings: The Fellowship of the Ring
The movie's prologue, narrated by the elf Lady Galadriel, explains that thousands of years ago, during the Second Age of Middle-earth, the rulers of elves, dwarves, and humans (known in Middle-earth as "Men") were given magical rings known as the "Rings of Power". But the evil Lord Sauron created the powerful One Ring in Mount Doom in his land of Mordor so he could rule all the other rings and conquer Middle-earth. An alliance of Elves and Men then defeated Sauron and his armies in Mordor, with Sauron being defeated by Isildur, a man of the kingdom Gondor. Isildur took the Ring and was corrupted by it, but the ring left him, allowing him to be killed by orcs. Thousands of years later, it was found by a hobbit, Smeagol, who kept it for centuries and became very attached to it; the ring slowly drew him mad, and turned him into the monster Gollum. However, the ring left him, too, and was found by the hobbit Bilbo Baggins, who was on an adventure when he found it.