Sounds like the beginning of a movie...

For years, Christiane Schaefer and Wolfgang Hock would meet regularly at an Italian bistro in Berlin. He would order pizza, and she would get the penne all’arrabbiata. The two philologists—experts in ancient writings—would talk for hours about dead languages and obscure manuscripts.

It was the fall of 1998, and Schaefer was about to leave Berlin to take a job in the linguistics department at Uppsala University, north of Stockholm. Hock announced that he had a going-away present for Schaefer. She was a little surprised—a parting gift seemed an oddly personal gesture for such a reserved colleague. Still more surprising was the present itself: a large brown paper envelope marked with the words top secret and a series of strange symbols.

Schaefer opened it. Inside was a note that read, “Something for those long Swedish winter nights.” It was paper-clipped to 100 or so photocopied pages filled with a handwritten script that made no sense to her whatsoever...

-- They Cracked This 250 Year Old Code