It's extremely rough.
Think of a world, much like our own, only more..fantastic. Dragons, Trolls, lion, tigers, bears, things called "Oh my" because that's all that you can say before they kill you, and that's all you hear before your buddy is gone, etc, etc, all exist in this world.
And within this world, is a legend. A legend of fifty crystals, each with a unique power. There is a crystal of Air, water, fire, wind, rebirth, immunity, immortality, reshaping, etc, etc, and each Crystal bears a symbol to represent what they are capable of....The legend also states that for the world to end, only 12 crystals have to be brought together to the monument of Mount Kaen'Jal.
Now, that's only if you want the world to end...if you want to reshape the world, of course, there are more requirements...Certain crystals must be brought together to reshape the world how you see fit, or to bring back someone who was dead back to life.
Now what if I were to tell you, that our story would begin during an age where Strangers have grown up, unknowing of the destiny before them, strangers with even stranger birthmarks....but under these birthmarks, lie the dormant powers of the crystals...and someone, or something, is trying to gather these strangers....or, gather their crystals, as it were...with fifty crystals, they would have untold power, and be able to reshape the world, perhaps the entire universe, as they see fit. As the Crystal bearers are hunted down, some band together, once they are awakened to their latent powers, of course, for protection, and to stop this mad...thing. Because he's killing them....after all, No one said that the Crystals have to still be inside their owners, yeah?...
But what is his motivation? What does he seek to do? Why is he gathering them? Is he a power mad diabolical embodiment of evil, hellbent on controlling the world? Is he an angry man, desperate to revive and old lover? Or is he an old, dying coot trying to take the entire world down with him? No one is sure, but one thing is certain...he must not succeed!
O_o...So yeah...I went on kind of a bender there, but as you can see, the idea is still rough...