When Ella sees two local girls being chatted up by a pair of dodgy-looking men on the train to London, she considers intervening but decides to mind her own business. The next morning, one of the girls is missing.
Fast forward to a year later, and we meet all those touched by the tragedy - Ella, the witness whose life has been turned upside down after being publicly shamed for 'doing nothing', the friend with survivor's guilt, the grieving father with a secret of his own... and the mysterious voice of someone obsessed with watching. But who is he watching?
Via multiple points of view, short chapters and sentences, Teresa Driscoll maintains a breathless pace and a complex plot where every character has something to hide. In the genre of quick-read, can't-put-it-down, twisty-turny domestic thriller, this one delivers to perfection.