Director Shawn Seet delivers a top production. The late 19th Century Melbourne location is captured with the help of some CGI backgrounds of the 1800's Melbourne. The mansion is big and fitting the plot of an aristocrat with a secret. The novel was written in the late 1800's by Fergus Hume and has had four films based on it. It was very popular. Even more than Sherlock Holmes by Sir Arthur Conan Doyle. Who killed the blackmailer is the main question. Could it be the fiance? John Waters is the father of Jessica De Gouw, Madge. Mario Chiappi is Waters' lawyer. Shane Jacobson is the first detective who is followed by Felix Williamson. Chelsie Preston plays Sal Rawlins who is key to all aspects of the plot. Helen Morse delivers the best performance as the down and out grandmother of Sal Rawlins. Glen Dolman wrote the script which keeps your attention from start to finish.