In the heart of London's elite gentlemen's club, "The Grill," a stranger captivates the attention of four gentlemen with a chilling tale. Lost in a thick fog one fateful night, he stumbles upon a house where a double murder has just occurred. The victims: a young nobleman and a Russian princess. As the American reports the crime to Scotland Yard, a perplexing mystery unfolds. Despite their efforts, the authorities cannot locate the house, leaving the identity of the killer and the motive shrouded in enigma. As the gentlemen delve deeper, they each unravel fragments of the truth, offering their own perspectives on the haunting events that transpired that foggy night.