A Viscount has gone missing and there are rumours of a dead man haunting the moors and a country hall beset by ghostly lights and spectres. Sherlock Holmes' housekeeper, the formidable , is faced with a mystery. Joined by her assistant , they're once again thrown into dark adventure full of gripping twists and murderous intrigue. Together with Holmes and Dr. Watson they must race against the forces of darkness to uncover the truth behind the mysterious document known as the Lazarus Testament. Lives are on the line and the puzzle must be solved... But not before a slice of Dundee cake.