It is February of 1939. International tensions are at an all-time high, and there is little trust in Germany's new leader as Ian Mackay, a decorated Royal Flying Corps ace of the Great War, settles atop the mountain of Ben Lomond to watch the sunrise. A short time later, Ian observes what he believes is an experimental German reconnaissance airplane spying on Scotland from above. But there are no other witnesses, and the rudimentary radar of the day is unreliable.

Ian has seen his share of hardship and unfortunately knows all too well about the realities of war. Still, he is driven...