During their quest, they encounter many ambushes by the "Orcs" which they overcome and usually slay. In some of the ambushes, Frodo uses his ring to become invisible to escape from the "Orcs" and "Black Riders". .
Boromir asks to see Frodo's ring because he has a yearning for power and authority and then tries to take it from him. Frodo, at the same time has become obsessed with the ring due to his overuse. Frodo decides to leave the Fellowship to go on his own to destroy the ring at Mt. Doom. The party is attacked by an army of "Orcs" and Frodo decides to escape on boat, but Sam follows, and they decide to go together to destroy the ring. .
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At the end of the book, the quest goes on with Sam and Frodo, together on a quest to destroy the ring in Mt. Doom. At the same time, the rest of their party decides to chase the army of "Orcs" and kill every last one of them. This story continues in the next book of the trilogy, The Two Towers.
The theme of power corrupts is shown throughout the book. Starting with the beginning of the book when Gandalf is warning Frodo of the possible dangers about the ring and states, "I should not make use of it if I were you" (Tolkien 59). The powerful wizard knows that the ring is full of power and that too much power can be dangerous. This is shown more clearly when Gandalf says, "It is far more powerful than I ever dared to think at first, so powerful that in the end it would utterly overcome anyone of mortal race who possessed it. It would possess him" (Tolkien 70). After having said that, he tells Frodo how the ring originated.
Later in the book when Frodo and his party are encountered by the wizard Galadriel, Frodo offers her the ring knowing that she deserves the ring the most and should be able to control the power. Galadriel is strongly tempted to take the ring when she says, "For many long years I had pondered what I might do, should the Great Ring come into my hands, and behold!" (Tolkien 431).