Sherlock Holmes - The Silver Earring

In May 1897 Sherlock Holmes & Watson are visiting Mr. Bromsby. Rumour has it that he has something special to announce. When Mr. Bromsby starts to speak, he collapses, with a red point showing on the front of his chest, just above his heart. Why was Bromsby murdered, can his beautiful daughter really be as innocent as she looks? Where is the murderer, and what dark secret is he trying to hide