Julian Blackwood
Younger brother
Charming, twice bankrupt, and living at the manor on Edmund's sufferance. Julian insists he spent the blackout fetching candles from the butler's pantry — though he returned without any.
Manor House · 2026-07-15
The Blackwood Manor Dinner — Manor House Murder Mystery Game
A toast is raised at Blackwood Manor — and the host never lowers his glass.
- Setting
- Manor House
- Difficulty
- Easy
- Suspects
- 4
- Est. Time
- 15–25 Min
- Access
- Free
Case Brief
Lord Edmund Blackwood invited four guests to an intimate dinner to announce, as his handwritten invitations put it, "a decision that will settle the family's affairs for good." The decision was never announced. Between the main course and dessert, the lights failed for less than a minute — and when they returned, Lord Blackwood was slumped over his untouched glass of port, dead.
The manor sits an hour from the nearest town, the telephone line was cut by the evening storm, and the staff had been dismissed for the night at his lordship's own instruction. Whoever killed Edmund Blackwood was sitting at his table, raised a glass to his health, and is still in the house.
Four guests. Four alibis that cannot all be true. The port was poisoned — but the bottle was opened at the table, and the glass never left his hand. Someone in that dining room knows how it was done.
The Victim
Lord Edmund Blackwood
Master of Blackwood Manor
Sixty-one, twice widowed, and famously exacting. Edmund spent his final months quietly meeting with his solicitor and auditing decades of family accounts. He told his valet the dinner would be "the end of a long deception" — and no one at the table admits to knowing what he meant.
The Suspects
Mrs. Agnes Hartwell
Housekeeper of thirty years
The only person Edmund trusted with the cellar keys and his correspondence. She served the port herself, and her hands, the guests agree, were shaking before the lights went out.
Charles Renwick
Business partner
Co-owner of the Blackwood shipping concern. He arrived with a contract Edmund refused to sign and a temper he refused to hide. Renwick swears he never left his seat in the dark — but his chair was found pushed back a full stride from the table.
Miss Eleanor Vane
Ward and niece
Raised at the manor since she was orphaned at nine, and the presumed heir — until, she admits, Edmund summoned her that morning and warned her "not to count on kindness." She was the one who screamed when the lights returned.
Locations
- The Dining HallCrime Scene
- Lord Blackwood's StudyRestricted
- The Wine CellarRestricted
- The Butler's PantryOpen Access
- The Rose Garden TerraceOpen Access
Evidence Log
- E-01Toxicology of the port glass and the opened bottle
- E-02The seating chart, written in the victim's own hand
- E-03A draft of an unsigned new will, found in the study fireplace
- E-04The cellar key log kept by Mrs. Hartwell
- E-05A torn letter recovered from the terrace drain
- E-06Candle stubs counted in the butler's pantry
Investigation Profile
- A closed-circle poisoning: four suspects, one room, sixty seconds of darkness
- Every suspect had the motive to want the announcement stopped — establish who had the means
- The poison entered one glass at a table where every hand was accounted for; break the trick and you break the case
- Recommended approach: reconstruct the blackout minute from all four testimonies before accusing
- Classic whodunit
- Poisoning
- Closed circle
- Family secrets
Case Status
UNSOLVED
The killer's identity is sealed inside the case engine — it is generated live when your investigation begins, and no two investigations unfold the same way. The only path to the truth runs through the interrogation room.
Start This Investigation — FreeAbout This Case
Is The Blackwood Manor Dinner free to play?
Yes — this is the featured free case in DETECTIVE.OS. New detectives get 100 welcome credits with no credit card required, which comfortably covers this investigation from briefing to accusation.
How hard is this murder mystery case?
It is rated Easy: four suspects and a tight, classic poisoning scenario. It is the recommended first case for learning how AI interrogation works before tackling larger cast lists.
How long does this case take to solve?
Most detectives close the Blackwood file in 15–25 minutes: a few minutes reading the case brief and evidence, then three or four rounds of interrogation before the accusation.
Can the suspects in this case actually lie to me?
Yes. Each suspect is played live by AI with their own secrets and alibi. The killer will lie under pressure; the innocent will mislead you to protect secrets of their own. No two playthroughs of this manor dinner unfold the same way.
