How fun.
Mine is a funny story, to be exact. My brother decided he was going to write a future dystopia story. I thought it had a great beginning (but he soon scrapped that idea, sadly. ), So while he was writing everything down. We started talking about how fast we could write something down; he asked to see how quickly I could do it, and I did just that and got my fantastic intro.
Afterward, we decided to encourage one another and work on our stories at the same time. We gave each other ideas and helped one another along the way. He has now changed it to medieval, but it is coming along just great. The prologue are just the words that popped up into my head. Took me have minutes to do a page and a half. 
And this is how Hell's Towers come into the world.
It began long ago. How many have died since that time? Too many. Where should I begin? I have no idea. Let’s start with a wish and the greed of Humans. What is the desire, the want for power, nothing but power and money. And that wish leads to chaos, nothing but pitch-black chaos.