Descius Heiss, Robert Graham, Margaret Heiss, Archie Fellowes, Corder Morris, Mrs. Catt, Major Elliot, and Professor Vanetti
What is the plot of The Shop at Sly Corner?
In Britain, a man with a shady past uses his antiquities shop as a front for smuggled diamonds but his young shop-assistant starts blackmailing him, leading to murder and to a police investigation.