Radio talk show therapist Sonny Blake moves back to her childhood home after her alcoholic father dies. Upon her return to the old neighborhood, Sonny discovers her neighbors are terrified of the local paperboy.

She thinks this is ridiculous, until she encounters the boy herself and learns the hard way that he is a cunning and dangerous sociopath. One who may have killed her father and several others. When the boy starts to call Sonny's radio show, reciting eerie nursery rhymes, an unnerving game of cat-and-mouse begins, which makes Sonny doubt her own sanity.

As the game escalates, she suddenly finds herself in a terrifying, all-out war that forces her to redefine her ideas of good and evil and has her fighting to stay alive.