The story revolves around a mysterious murder that takes place in a wealthy businessman's mansion, where the victim is found with a red window open in his room. The investigation that follows reveals a complex web of relationships and motives among the characters, including the businessman's wife, her lover, and the victim's rival. As the detective digs deeper, he uncovers a trail of deceit, blackmail, and hidden secrets that lead him to the killer.
By Fergus Hume · First published 1907 · Genre: Literary Fiction, Historical Fiction, Romance · 23 chapters