It’s April 21, 1918 and pilots are fighting air battles over the trenches of the First World War’s Western Front. Among them is the “ace of aces” Manfred von Richthofen in his distinctive triplane which is painted a vivid red. Now the Red Baron, as he’s known, has 80 kills to his name. But his low-flying plane seems to be out of control. And crucially, he’s heading for a crash landing.