Sixteen-year-old Blaire Adams can walk through mirrors. It's called breaking symmetry. To her, a mirror feels like a film of honey. She can reach through it, grab things ... even step inside. On the other side she lives every teenager's fantasy: a universe all her own, zero consequences. She can kiss the hot guy, break into La Jolla mansions, steal things ... even kill. When finished, she just steps back into reality and smashes the mirror -- and in an instant erases every stupid thing she did. Gone. It never happened. But breaking symmetry is also dangerous. First there's the drug-like rush she gets when passing through the glass, like a shot of adrenaline. She suspects it's degrading her body, making a new copy of her each time. A reflection of a reflection, each one a little hazier. Then, of course, there's the risk of getting cut off from reality. When she narrowly escapes a military quarantine zone with the San Diego Police Department hot on her heels only to discover her escape mirror littering the floor in shards, her worst fear is realized. Now, trapped in a broken reflection, she must flee through a mind-bending maze of mirrors, going deeper into the nightmare as she struggles to grasp a betrayal, uncover the chilling truth about her ability, and somehow find a way out of a dead-end universe that "never happened." Somehow, she must find a way home.