Crossing Lines

Usually if you're an Aid , like Gia Garcia , you can't cross the sacred line to the world of Edella . If you do, you burn and then, of course, die . Years and years of Aids trying to cross the line and explore Edella with it's people, the Dens , have failed . Yet one day, when Gia falls over the line , she doesn't burn . She's perfectly fine. As if she was still on her side of the world . Though when her friends try, it doesnt work out too well. Why doesn't Gia react the same way as the other Aids ? How will this sudden change affect her life?