The Shadows
There is a world hidden in our own. This is where magic lives. People who are touched by magic, touched by evil, or touched by something older and darker than everything drift between our world and the shadow. Since they have been discovered, there has always been a struggle between the two. Our world has a hard time with anything different. And the people of the Shadow are different.
Sometimes people who are of the shadow hide in the real world. Or they are forced to hide there.