July 1915: Although they have not made up their quarrel, Alan and Charles are forced to continue flying as a team. Ordered by Triggers to continue with reconnaissance and to avoid the enemy, they are anxious to do something about the German plane that has been causing them so much trouble, particularly after it shoots down Charles's friend Lt Favell. Charles devises a method of fitting a Lewis gun to their plane, which Alan carries out, using his metalwork skills.