When voices only he can hear tells Lucas Darby to run, he runs, telling his sister Rayne not to look for him. Searching for him anyway, Rayne meets Gabriel Stewart, a runaway with mysterious powers, and they discover that Lucas is running a church group called the Believers that hunts "Indigo," or psychic teens, fearing them to be man's next stage of evolution. Now, Rayne must depend on Gabe, who has a terrifying new power awakening inside him.