There are two worlds: one fantasy and one ours. Occasionally, people fall through the barrier between the two but it's rare accident. No one has passed between worlds intentionally before.
What little magic is practiced in our world is hidden by lies and illusions. It exists but only just and anyone who swears to believe in such things is considered insane.
The fantasy world, on the other hand, is a world of illusions and aristocracy. Magic is everywhere but it's generally used to make life easier and defending the cities from monsters. The only way to use magic to become powerful is to become a corrupt warlock called a Wicked. The RP will start when a few Wickeds break a hole between their world and ours. Anything can come in, anyone can go out.