Skylar is the Otono family Generation Shapeshifter. Yes, it's a big deal. Because only the oldest sibling from every other generation gets these special genes... Carolyn is Skylar's only sister. She's also the oldest.
Carolyn finds a letter from their late grandmother, who was the last Shapeshifter. In the letter is a confession of a broken heart. 'Life consists of two facing mirrors, their images repeat.' Skylar unknowingly repeats her grandmother's mistake and now she must face the consequences. If only she knew what they were. And it doesn't help that someone is out for her blood, literally.