Silk gloves, candlelight, and polite applause conceal something unspeakable in this Regency-era Call of Cthulhu one-shot. What begins as an elegant evening at the opera slowly unravels into dread, as secrets stir behind velvet curtains and the music carries more than it should. Our investigators navigate society, scandal, and creeping cosmic horror in A Night at the Opera, a Regency-set scenario where manners matter—and madness listens patiently. Expect slow-burn tension, character-driven horror, and a focus on story over spectacle. System: Call of Cthulhu Regency setting Content warnings: cosmic horror, psychological distress, implied violence, occult themes, and non-graphic body horror. If you enjoy tabletop horror, historical settings, and stories that linger long after the dice stop rolling, you’re welcome at the table.