In Middle-earth, the Dark Lord Sauron forged the Great Rings of Power and created one with the power to enslave all of Middle-earth. Frodo Baggins is a hobbit who is made the bearer of the powerful One Ring by his uncle Bilbo with the mission of destroying it. Accompanied by his friends, Frodo sets out on a journey towards Mordor, the only place where the ring can be destroyed. However, Sauron orders the group's pursuit to recover the ring and end Middle Earth.
The hobbits Frodo and Sam discover that Gollum is following them. The creature promises to guide them to the gates of Mordor if they then let him free. Aragorn, the elf Legolas and Gimli the dwarf arrive at the kingdom of Rohan and discover that King Theoden is under the spell of Saruman. The traitor wants control of the kingdom to continue his plans in Mordor, pending the war in Middle-earth.
The battle for Middle Earth has begun. Saruman's forces have been destroyed and for the first time there seems to be a small hope. However, Sauron's power grows and his interest focuses on Gondor, the last stronghold of men, whose heir is Aragorn. Meanwhile, Frodo and Sam, guided by Gollum, continue their dangerous mission through Mordor to destroy the ring.