The Council decides that the Ring must be destroyed, but that can only be done by returning it to the flames of Mount Doom in Mordor, where it was forged. Frodo volunteers to take on this daunting task, and a "Fellowship of the Ring" is formed to aid him: Sam, Merry, Pippin, Aragorn, Gandalf, Gimli the Dwarf,Legolas the Elf, and the Man Boromir, son of the Ruling Steward Denethor of the realm of Gondor.
After a failed attempt to cross the Misty Mountains via the pass below Caradhras, the company are forced to try a more perilous path through the Mines of Moria, where they are attacked by the Watcher in the Water before the gate. Inside, they discover the fate of Balin and his colony of Dwarves. After repulsing an attack, they are pursued by orcs and an ancient and powerful demonic creature called a Balrog. Gandalf confronts the Balrog, but in their struggle, both fall into a deep chasm. The others escape and take refuge in the Elven forest of Lothlórien, where they are counselled by Galadriel and Celeborn.
With boats and gifts from Galadriel, the company travel down the River Anduin to the hill of Amon Hen. Boromir succumbs to the lure of the Ring and attempts to take it from Frodo. Frodo escapes and determines to continue the quest alone, though Sam guesses his intent and comes along. The Fellowship of the Ring is broken.