Lord of the Rings: Return of the King is the final installment in the Lord of the Rings Trilogy. The battle of Minas Tirith is about to begin and Gandalf, with Pippin by his side, joins to aid the humans in their conquest over evil. Aragon, Gimli and Legolas travel to find aid for Gondor. Merry rides with Rohan, the cavalry, to fight at Minas Tirith. Frodo and Sam struggle up Mount Doom to destroy The Ring and save Middle Earth. They must succeed in their struggles because if they fail Sauron will cover Middle Earth in a blanket of darkness from which the world can never recover.