Louise is bereft.
Her seven-year-old son Joseph has been sent away to boarding school against her wishes, and she misses him desperately.
And the neighbour from hell is keeping her awake at night by playing loud, intrusive music.
So when the chance comes to move to the country, she jumps at it as a way of saving her sanity.
Only it doesn't.
Because the music seems to have followed her. Except this time it's choral music, sung by a choir of children that only she can see and hear ...