The Lord of the Rings Trilogy
Assisted by a Fellowship of heroes, Frodo Baggins plunges into a perilous trek to take the mystical One Ring to Mount Doom so that it and its magical powers can be destroyed and never possessed by evil Lord Sauron.
Now, you need to watch the trilogy at least once. And, chances are you, you already have. And, this may go against the rules of this thread, but the first part alone won't do you much at all. You have to watch the entire trilogy if you actually want to get into LOTR. And, a good thing is to also watch them in extended cuts.