Saxophonist Danny witnesses the murder of his band manager and a deaf-mute girl after a gig. Questioned by the police, he remembers only the orthopedic shoes of the killers' leader. So begins his quest to avenge her. He seeks an answer to the simple question 'Why?' but finds only more, and deeper, questions which resonate with the wider context of 'the Troubles', the inter-communal strife gripping the modern-day Northern Ireland which is the film's setting.