15-year-old Mari Quillen is about to become invincible. Just like everyone else.
For years, Mari has been anxiously awaiting the day when she will receive her Amplifier; a small device implanted behind the ear that gives someone limitless capabilities through verbal commands. But once she finally becomes Amplified and begins mandatory Training with the rest of her peers, she begins to see that her natural ability to resist and act for herself brings dangerous consequences, as well as unwanted scrutiny from Governor Plenaris, the Community's most revered official. She grows increasingly wary of the Amplifiers as she watches how they affect her friends and brother, constantly wondering if Amplification is really as fantastic as she thought it would be. Sure, she can perform elaborate acrobatics and recall obscure information, but how can she be sure the Amplifier isn't controlling her?