By command of the Emperor, court librarian Lambeck brings the book treasures from Schloss Ambras in the Tirol to Vienna. "Im Auftrag seiner Majestät", a docudrama and a baroque literary thriller, tells the fascinating tale of the Schloss Ambras book treasure that was taken to Vienna in 1665. Peter Lambeck, the court librarian, was entrusted with this delicate mission. He describes the journey from his own personal viewpoint. Martin Ambrosch, author and director of the film, tells of the immense value of these costly books that today form the core of the Austrian National Library.