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..."
the words would become visible.
.فستصبح الكلمات مرئيّة
würden die Wörter
sichtbar werden.
tras usar los químicos correctos.
usando los químicos correctos.
pour que ton message apparaisse.
tramite l'applicazione 
del giusto composto chimico.
é possível fazer com que ela se torne visível.