In 1900, Sir Arthur Conan Doyle has just killed off Sherlock Holmes in the short story “The Final Problem,” and the Great Detective’s many fans are outraged. After the arrival of a letter bomb in his mailbox, Conan Doyle goes to Scotland Yard for help and finds himself, along with his good friend Bram Stoker, embroiled in the murders of three young suffragists. Is it the work of a serial killer, and what is the connection to the attempts on his own life?