With his uncle Bilbo having mysteriously disappeared, Frodo finds himself in possession of a simple gold ring that has great and evil power. It is the Ruling Ring, taken long ago from the Dark Lord, Sauron, who now seeks to possess it again. Frodo must do everything he can to prevent this, and with the help of Gandalf the wizard and a band of loyal companions he begins a perilous journey across Middle-earth. Sauron's Black Riders are on their trail as they travel to Rivendell, attempt to cross the snow-swept Misty Mountains and, in desperation, enter the terrifying Mines of Moria.