Pearl of death: Holmes must solve a series of murders involving busts of Napoleon and a missing gem that has caused murder and misfortune since the days of the Borgias. -- The scarlet claw: Holmes and Watson journey to Canada to attend a meeting of the Royal Canadian Occult Society. Before long, they are investigating a series of murders that the locals attribute to a legendary phantom marsh monster. -- The spider woman: With all of London aghast at a mysterious succession of "pajamas suicides," Holmes decides the deaths are diabolically planned murders committed by a mysterious woman. -- The house of fear: The Good Comrades are a collection of gentleman residing at Drearcliff House, ancestral home of their eldest member. One by one the members begin to perish in the most grisly of manners and Holmes is asked to investigate.