
The Hawthorne Affair
A priceless diamond vanishes from a locked case — and the thief is still inside Hawthorne Manor.
About this adventure
The Celeste Diamond is gone, the manor is sealed, and Inspector Voss of Scotland Yard is watching every face for cracks. Beneath the wilting flowers and strained pleasantries of last night's Winter Masquerade, a theft has been staged, a family secret is in danger of surfacing, and the wrong person may hang for it before morning is out. Play as Constance Vail, a razor-sharp society journalist who knew about the cipher before the theft began, or Dr. Phineas Croft, a forensic physician who saw something near the conservatory that no one has thought to ask him about.
Prologue
London, December. The fog has not lifted since the night of the Duchess of Hawthorne's Winter Masquerade Ball — as though the city itself has drawn close to listen. Sometime between the third waltz and the midnight supper, the Celeste Diamond vanished from its locked display case in the manor's east gallery. By dawn, Inspector Aldric Voss of Scotland Yard had sealed the doors. No one has left. No glass was broken. No lock was forced. And yet the pendant — a teardrop sapphire ringed with flawless diamonds, and the most celebrated jewel of the London season — is simply gone. The guests wear their composure like costumes. The servants have gone quiet in the particular way of people who know more than they intend to say. And somewhere inside Hawthorne Manor, beneath the smell of extinguished candles and cold champagne, a secret older than the theft is beginning to surface — one that could undo a family entirely, if it reaches the wrong hands. Voss is methodical, thorough, and running out of patience. An arrest is coming. Whether it finds the right person depends on what the next few hours reveal — and who is paying close enough attention to see it.
Your AI Dungeon Master is waiting
Play The Hawthorne Affair and dozens of other AI-driven DnD adventures. Solo or with friends — free to start.
Download on theApp StoreCharacters in this adventure
Pick a perspective. Each character shapes how the AI Dungeon Master tells the story.

Constance Vail
Human · Journalist

Dr. Phineas Croft
Human · Forensic Physician
More AI DnD adventures

The Abductions
When villagers vanish without trace, the truth descends from the stars—and defies all understanding.

The Phantom of Ravencrest Manor
A nobleman vanishes from a locked study—but the truth behind his disappearance may tear reality itself.

The Inheritance
A wealthy industrialist lies dead in a locked study—and his killer is still in the house.
