This Swedish release combines the two first expansions to Sherlock Holmes: Consulting Detective - The Mansion Murders and The Queen's Park Affair - into a standalone game. Like the Swedish edition of the first game it was produced and marketed by Äventyrsspel (later Target Games) but published under the Casper label. As in the original game, the players are tasked to solve a crime or mystery, alone or as a group. Initial information provides clues on which leads to pursue through a paragraph system, hopefully uncovering further clues until a convincing solution can be pieced together. At the end of each scenario, Sherlock Holmes himself will summarize the case and how it should optimally have been solved.