After Boromir's death and Gandalf's disappearance, the Fellowship has split into three. Lost in the hills of Emyn Muil, Frodo and Sam discover that they are being followed by Gollum, a volatile creature corrupted by the magic ring. Gollum promises to lead the Hobbits to the Black Gate of Mordor. Across Middle-earth, Aragorn, Legolas and Gimli make their way to Rohan, the besieged kingdom of Theoden.