Either the three children of link and zelda, or three friends (one being a descendent):
Each gain a piece of the triforce.
The oldest brother becomes evil, but with wisdom, and gains courage to change the world from the sister.
Now having two pieces of the tri-force, he must gain the one thing that he has desired the most: Power. Except that the youngest brother has it, and is too wimpy to use it,(having no courage).
Through the story, our main protagonist gains some courage and unlocks powers within himself.
Yes, throwing boulders is just the beginning. Fireballs, etc.
Don't wanna mess with the new Link (or links descendent)