The product line focuses on the fictional world of Middle-earth, the films follow the hobbit Frodo Baggins as he and the Fellowship embark on a quest to destroy the One Ring, to ensure the destruction of its maker, the Dark Lord Sauron. Lego The Lord of the Rings was based on The Lord of the Rings film trilogy.
The Hobbits then flee up the stairs to the watchtower, and the five Ringwraiths close in.
While Aragorn scouts around, the Hobbit's campfire alerts the Ringwraith of their position before Frodo can stamp it out. It represents the scene in The Fellowship of the Ring where on their way to Rivendell, Aragorn and the four hobbits camp in the ancient Arnorian ruined watchtower of Amon Sul.