The Kings Royal Rifles (KRR) - The Somme, 1916...The KRR must guard a trench called Downing Street throughout the prolonged allied bombardment of the enemy trenches, but encounter trouble with a German officer. Coerced into all sorts of mischief, cockney boy, Bill Auger, is obliged to use his boxing skills and his marksmanship. However, while Auger and Plumpkin are doing so much ducking and diving, the rest of the platoon have their first encounter with what is known as an "idiot shot", which suddenly immerses all in not one, but three battles at the same time.