The Shadow on the Glass

At a gathering hosted by Mr. and Mrs. Unkerton at Greenway's House, Mr. Satterthwaite discovers a haunted window that perpetually displays the figure of a gentleman in a plumed hat, regardless of how many times it is replaced. The evening takes a dark turn when gunshots ring out and two guests are found dead, coinciding with another sighting of the mysterious figure. As the intrigue deepens, Satterthwaite seeks the insight of Mr. Quin to unravel the puzzling events.