Mirrored Worlds

A prophecy was once made by a witch as she was being burned for treason. It caused the world become cautious around mirrors and such for only a few years. But soon this prophecy faded from the memories of the people, though it's been dug up by a new rising evil who expects it to come true. Two girls look at a mirror at the same time not expecting to see a different reflection from their own. One takes advantage of this and pushes the other through the mirror and now the two are in the other's world. What will happen when things begin to take a turn for the worst?