It is so hard when your children go to school. A small part of you leaves with them. So when the Beestons' son is accepted on a prestigious choral scholarship to a boarding school near their holiday home in the country it seems like the perfect time to get out of the city. Things have been bad with their neighbour for a while now anyway. Susannah has long been driven mad by the constant and thudding music coming from next door every weekend. And his latest taste in choral music seems like a taunting, especially as he always plays it when her husband Daniel is away. But their move to the country doesn't offer the solace Susannah needs. Again she is plagued by the sounds of a children’s choir. It follows her wherever she goes. Tormented by the haunting melodies of the choir, which no one else can hear, Louise Beeston starts to suspect that this sinister chorus is a warning of some kind and is plunged into a world of obsession, loss, and evil as she tries to find its source. So when the children turn up on her doorstep, she’s ready to call the police. But this is no normal choir.