If you stare in the mirror long enough, you might see something sinister staring back.At first, she thought it was her imagination, but when sixteen-year-old Chloe discovers she can travel through mirrors, she is thrilled to have found a way to escape the dreariness of her life.But as she explores these new worlds, she realizes they're not as safe as she initially thought. Something malevolent known as the Shadow Fiend has followed her back to her world, and it's threatening to destroy everything she holds dear.Can Chloe find a way to stop the Shadow Fiend from destroying the mirrorverse and her world before it's too late?