Laura William's life changes dramatically when her eleven-year-old brother, Billy, is killed by a terrorist package bomb in the London Underground. Completely distraught, she turns from feelings of mourning and loss towards anger and revenge.
With her parents completely overcome by their son's death, she begins a determined search for the person who took her brother's life as well as the reason for which he or she did it. Everyone she knows becomes a suspect in Billy's murder, including her friends.
Her search will ultimately lead her to the true murderer, but first she must come to understand herself as well as some of the workings of the outside world.