The Secret Jewel

This ordinary girl starts ordinary. Then she discovers about a crystal... a magic crystal! She has been told a big secret, a secret that she couldn't really keep. She has to go on a treacherous journey to defeat 1 out of 10 underworld animal/human monsters, and they all want magical jewels that are spread over the land. Will she make it to the end?

I know-not the best description, but it was all i could think of... and this is gonna be the only story in the whole entire thing so... yeah!