The story revolves around a mysterious murder that takes place at a country house in England. The victim is a wealthy businessman who has been receiving threatening letters from someone claiming to be the "Black Patch." The main suspect is the businessman's nephew, who stands to gain a large inheritance from his uncle's death. However, as the investigation unfolds, it becomes clear that nothing is as it seems, and the true identity of the killer remains elusive until the very end.
By Fergus Hume · First published 1906 · Genre: Mystery, Romance, Drama · 26 chapters