What is the conflict in the novel, The Terrorist?

The novel's conflict is propelled by the death of Laura William's eleven-year-old brother, Billy, who is killed by a terrorist package bomb in the London Underground. Completely distraught, Laura turns from feelings of mourning and loss towards anger and revenge, and as a result, 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.

Laura's 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.