Voices told Lucas Darby to run. Voices no one else can hear. He's warned his sister not to look for him, but Rayne refuses to let her troubled brother vanish. On her desperate search, she meets Gabriel Stewart, a runaway with mysterious powers and far too many secrets. Rayne can't explain her crazy need to trust the strange yet compelling boy — even though he scares her.

They discover Lucas is running from the Believers, a fanatical church secretly hunting psychic kids — gifted 'Indigo' teens feared to be the next evolution of mankind. Now Rayne's only hope is Gabe, who is haunted by an awakening power — a force darker than either of them imagine. A force that could doom them all.