To heaven, hell, and back again: The era of world's end

In a world where everything exists in peaceful chaos, it's important to keep the balance intaxt.
All the religions are mixed up, as well as all kinds of races.
Humans, Werewolfes, Demigods, Halflings, Wizards and Elves, they all live together on earth.
But what happens when a group of friends find out something they shouldn't about the system that keeps everything in order?
When it's up to a group of dysfunctional teenagers to save the world they not always loved, it's safe to say that anything can happen.