High school senior, Anna Faraday, has a remarkable singing gift that liberates something inside people, and yet, she is stuck living cautiously after a fatal accident took her brother’s life. The one thing that tempts her to break free and take a risk is Chase, the hot new American guy in her grade. When a simple trip to the high school physics department sees her targeted for her voice, and a reckless car drive ruins the most romantic night of her life, Anna is then forced to sing for a secret frequency-based experiment that goes wrong. Left fading from existence, she is thrust from her carefully measured world into a terrifying reality that leads her to seek help from Rennie Parker, the last guy she ever thought she’d ask—a guy invisible to her, until then. Now the one unseen and unheard, Anna knows time is running short. Will Rennie, or anyone, understand what’s happened before she disappears forever?