As the Great War begins, Billy and Jack Kelly together with cousin Paddy sign on and are shipped out to serve in Europe. Billy, a known marksman is singled out to head up a highly successful sniper team. Billy's sniper abilities and courage in hand to hand fighting astounds his fellow soldiers, he is awarded the Legion of Honour. Back home, Billy's parents confronted with lawless bushrangers who threaten their lives and livelihood. In Europe, Billy's team are sent forward to harass the enemy prior to a major assault on the infamous and impregnable Hindenburg Line. As Billy is victorious on the battle field the bushrangers kill his father, and kidnap his sister. Now returned from the war Billy realizes that his fighting has just begun.