The story follows the adventures of two Englishmen, Sir Charles Vandrift and his friend, Mr. John P. Dunster, as they travel to Monte Carlo. While there, they become embroiled in a mysterious murder case involving a beautiful young woman, a mysterious stranger, and a sinister plot. The two men soon find themselves in a race against time to solve the mystery before the murderer strikes again. Along the way, they must contend with a host of colorful characters, including a shady casino owner, a mysterious Russian countess, and a mysterious figure known only as the "Man in the Mask." As the mystery deepens, the two men must use all their wits and courage to uncover the truth and save the day. Will they be able to solve the mystery in time? Or will the murderer get away with his crime?
By E. Phillips Oppenheim · First published 1933 · Genre: Mystery, Crime Fiction, Thriller · 24 chapters