"The White Room" by Fergus Hume is a novel written in the early 20th century, likely during the early 1900s. This mystery unfolds in a quiet suburb of London, where the seemingly serene neighborhood conceals dark secrets. The story begins with the murder of a young woman found dead in a lavish, all-white room, alongside the intertwining lives of various characters, including a constable named Mulligan, and the mysterious young man who was last seen near the victim. The opening of the novel introduces Constable Mulligan on his night watch, where he becomes intrigued by a mysterious light and music coming from Ajax Villa. After encountering a well-dressed young man, whose sister is supposedly singing inside, Mulligan is lured away from his post, only to later discover the shocking murder of a woman in the white room of the villa. As details unfold, the plot raises questions about the identity of the woman, the circumstances leading to her death, and the enigmatic connection to the man carrying the latch-key to the house. (This is an automatically generated summary.)