[1] It was part of a very successful series of German films based on the writings of Edgar Wallace and adapted from the 1931 play The Case of the Frightened Lady.

After the rich Lord Lebanon has been strangled, a group of different characters assembles at Mark's Priory, his remote manor in the north of Scotland, to attend the reading of his will.

The last will is read, and it is revealed that Lord Lebanon has in fact, left all his money to the man he considered to be the greatest of the century: Edgar Wallace.

The script to the film was adapted first by Georg Hurdalek and then Harald G. Petersson from an original treatment by Egon Eis, written under the pen name of Trygve Larsen, that had not found the approval of the producer.

[3] Heinz Drache was cast for this film after having starred as the hero of a very successful TV production of Francis Durbridge's The Scarf (Das Halstuch [de]), which involved a similar modus operandi and was first aired in 1962.