Most stories are not about people with super powers trying to save the world. Unless you meant it in the general sense of "a person or a group of people have to overcome an obstacle", which is a lot more vague than that description.
Basic Formula:
1. Person (usually a younger person in a situation such as poverty or simply obscurity) overcomes their situation or is drawn out of it by a greater evil (World destroying demons, evil wizards, corrupt businessmen, etc.)
2. That person then (usually) will find a person or group of people willing to help him. (train him, accompany him, etc.)
3. After "adventuring" awhile, they will usually come across a dark secret or other important information that makes the situation seem doomed/more difficult/hopeless.
4. The main character will mope around a bit, but then find that he/she truly has: A. Had the power all along, be it in the form of a super power, secret ghost mentor, hidden enchanted weapon that was their [insert friend/relative here]'s posession. or B. Find out that they can get the power/mentor/weapon by questing for it.
5. Kill the big bad, story end.
Edit: This is kind of general, as are most things. This formula is usually redone in an attempt to make it seem fresh.
Also: Some things may be incorrect/out of order. I typed this pretty quickly and with only my eyes as spellcheck.