Hermann Wolff, a Wehrmacht Colonel assigned to German's intelligence agency, the Abwehr, investigates a suspicious train crash on the outskirts of Berlin with his right-hand man, Lieutenant Johann Bauer. Among the belongings of one of the bystanders is one of a spy's standard tools of the trade. When interrogated, its owner claims to have stolen it from a Japanese man named "Maki Katsuhiko..."
a nation friendly to us, 
be sneaking into our country?
وهي بلاد صديقة لنا، موجود خلسة في بلادنا؟
einer uns freundlich gesinnten Nation,
sich in unser Reich schleichen?
auraient envoyé un espion
dans notre pays ?
per introdursi così nel nostro Paese?
o Japão se daria o trabalho
de se infiltrar no nosso país?