Thea Denny hates the tenth grade, and her home life isn’t easy. But she’s passionate about making art—and about her math-genius boyfriend, Cam, a recent transfer to her upstate New York high school from California.

One day Cam mysteriously vanishes—and then things really get weird. The stars on the school flag go missing, eerily cut out. Intimate videos of Cam and Thea start going viral online—videos they never took. The FBI gets involved. And Thea can hear the voice of Melody—a beautiful, disabled girl her age, whose illness has left her mute since birth.

Cam once claimed to be the world’s foremost hacker…Is he trying to reach her, send her a sign—or is Thea losing her mind?