During a series of midnight walks through London, Dr. Watson becomes fascinated by a magnificent rooftop conservatory where an elegant society gathers night after night beneath glittering chandeliers and exotic palms.
Unable to resist the mystery, he ventures inside, where he is welcomed with impeccable courtesy.
At first, the gathering seems everything it promises to be. Yet beneath its flawless manners and effortless charm, Watson begins to sense that something is terribly wrong.
Soon he finds himself confronting one of the strangest and most terrifying mysteries of his career—one that will test every lesson he learned at the side of Sherlock Holmes.
