"The photo on the card shows a boy who was found murdered, a year ago, on the grounds of a girls' boarding school in the leafy suburbs of Dublin. The caption says I KNOW WHO KILLED HIM. Detective Stephen Moran has been waiting for his chance to get a foot in the door of Dublin's Murder Squad--and one morning, sixteen-year-old Holly Mackey brings him this photo. Someone has reignited the stalled investigation into the murder of handsome, popular Chris Harper. Stephen joins forces with the abrasive Detective Antoinette Conway to find out who and why. But everything they discover leads them back to Holly's close-knit group of friends and their fierce enemies, a rival clique--and to the tangled web of relationships that bound all the girls to Chris Harper." --,from publisher's web site.