Haunted mansion murder mystery
A haunted mansion gives a murder mystery everything it needs: flickering candles, locked doors, a family with too many secrets and a house that seems to be listening. This theme is set at Hollowmere House on Halloween night, where a midnight séance goes very wrong. The cast mixes old-house regulars with modern visitors (a reluctant heir, a ghost hunter with a livestream, a skeptic who swears it's all drafts and wires), so guests can wear gothic velvet, a hooded cloak or the Halloween costume they already own.
The chills are PG-13 and all about atmosphere: creaking floorboards, a stopped clock, a knock from the wrong side of the table. It's the kind of spooky that makes people laugh and lean in, not the kind that sends anyone home early. You set the fright level with the lights: dim them and add flickering battery candles for more shivers, or keep the lamps on for a cozier, funnier evening.
Killer Cast writes the case around your guest list, so every friend becomes a suspect with a secret, a motive and clues to share. Each guest gets a private invite page with their character and costume ideas, plus an optional portrait drawn from their selfie in a gothic storybook style. On the night, narrator audio with captions sets each scene from your TV, and the interactive Evidence Locker gives up items like spirit photographs, torn pages from a family register and letters sealed in wax. Host it on Halloween or the weekend before; the timeline, menu and decor ideas below get a group of 6 to 20 adults there on a small budget.
Hollowmere House, a crumbling Gothic Revival mansion on a fog-bound hill, where the family and a few unlikely guests gather every Halloween for a midnight séance. The clocks stopped years ago, the portraits seem to watch you, and tonight someone at the table won't see November.
Hollis Hollowmere
Sable Crowe
Briar Thistlewood
Riley Fairlie
Meet the
suspects
Hollis Hollowmere
The reluctant heir
Inherits Hollowmere House at midnight, provided Hollis spends the whole night under its roof. Hollis doesn't believe in ghosts, but keeps glancing at the stairs anyway.
“Wants the house sold by Monday and the ghosts gone by Sunday.”
Costume ideas: A dark velvet blazer or a long black dress with a high collar, an oversized antique-style key on a chain, a family-crest pin (print one and glue it to a big button).
Sable Crowe
The celebrated medium
Has led séances in a hundred old houses and swears Hollowmere is the most crowded. Sable's voice drops an octave whenever the candles flicker.
“Knew the ghost's name before anyone at the table said it out loud.”
Costume ideas: Layered black lace or a velvet shawl, Rings on every finger and a crystal pendant, a hooded cloak for the midnight séance.
Briar Thistlewood
The groundskeeper
Has tended the hedge maze and the family plot for twenty years and knows every hidden gate on the grounds. Briar talks to the crows more than to people.
“Dug a fresh hole by the hedge maze last night and filled it back in before dawn.”
Costume ideas: A flannel shirt, work vest and boots, Gardening gloves with a trowel in a back pocket, a battery-powered lantern.
Riley Fairlie
The ghost hunter
Runs a late-night paranormal livestream with a loyal following and a gadget for everything. Riley is desperate for one clear minute of proof.
“Deleted forty seconds from last night's livestream before anyone else could watch them.”
Costume ideas: A utility jacket or cargo vest covered in pockets, a flashlight and a homemade spirit meter (a TV remote dressed up with foil and stickers), Headphones around the neck.
Drew Merriweather
The real estate agent
Has a buyer lined up for Hollowmere and a contract that very clearly says "no hauntings." Drew is all smiles and business cards, with a nervous laugh every time a door creaks.
“Sold this house once before, to a buyer who left in a hurry and never came back.”
Costume ideas: A bright blazer or suit in a cheerful color, a name badge and a stack of homemade business cards, a "For Sale" sign taped to a paint stirrer.
Merritt Thorne
The housekeeper of forty years
Has run Hollowmere since before the clocks stopped and knows which stairs creak and which walls are hollow. Merritt is loyal to the family, or at least to the house.
“Sets one extra place at the table every Halloween, and won't say who it's for.”
Costume ideas: A black dress or dark suit with a crisp white apron or collar, a heavy ring of keys clipped to a belt, a feather duster or an unlit candlestick.
Devon Hargreave
The professional skeptic
Debunks haunted houses for a living and arrived with a toolbox to prove Hollowmere is nothing but drafts and old pipes. Devon is very good with wires, suspiciously good.
“Rigged ghostly knocks one, two and three tonight. Not number four.”
Costume ideas: A turtleneck with a tweed blazer or sweater vest, Reading glasses on a chain and a notebook, a small toolbox or a screwdriver in the pocket.
Indigo Pryce
The family historian
Has spent ten years writing the definitive history of the Hollowmere family and has read every letter in the attic. Indigo knows which family legends are true and which were invented.
“Found a page torn from the family register and quietly glued it back in the wrong place.”
Costume ideas: A cardigan, a long scarf and round spectacle frames, an old leather-bound book or journal, a magnifying glass on a ribbon.
On party
night
Shown with a sample Old Hollywood Awards Night party. A Haunted Mansion case gets its own story, evidence and portraits.
The invite 
Their part 
Clues each round 
The Evidence Locker
Dress the
part
For everyone
- Gothic finery: black lace, velvet, high collars, long coats, waistcoats or flowing skirts
- Come as a ghost of the house's past: any old-fashioned outfit, dusted pale and draped in cheesecloth
- Modern visitors are welcome too: a flashlight, a notebook and a sweater make an instant ghost hunter, skeptic or real estate agent
- A hooded cloak, the unofficial uniform of the midnight séance
- All black with a single silver accent for a classic mourning-era look
- Already own a Halloween costume? Add a candle and a mysterious backstory and you're ready
On a budget
- Turn a black bedsheet or fleece throw into a hooded cloak with safety pins and a ribbon tie
- Drape strips of torn cheesecloth over any thrifted outfit for instant attic-ghost chic
- Thrift a high-necked blouse, an old blazer or a long skirt and add a lace collar cut from a paper doily
- Dust dark clothes with a little cornstarch for a "shut in the attic for a century" look; it shakes right out afterward
- Make a cameo brooch from a bottle cap, a printed silhouette and a coat of clear nail polish
Accessories that sell it
- A hooded cloak or long velvet cape
- A cameo brooch, locket or skull ring
- Oversized skeleton keys on a ribbon
- A battery candle or lantern to carry between rooms
- A pocket watch stopped at midnight
- Black lace gloves or a lace veil
- A crumpled top hat or bowler for a groundskeeper or undertaker
The menu
- Drinks
- Graveyard punch: cranberry juice, orange juice and ginger ale with a floating ice hand made by freezing water in a clean disposable glove (naturally alcohol-free; set spiced rum on the side)
- Corpse Reviver No. 2: gin, orange liqueur, white aperitif wine and lemon with a rinse of absinthe (alcohol-free: lemon, orange juice and a drop of anise syrup topped with tonic)
- Hot mulled cider kept warm in a slow cooker (naturally alcohol-free; add bourbon on request)
- Blood orange and rosemary spritz (alcohol-free: blood orange soda over ice with a rosemary sprig)
- Black velvet: stout layered over sparkling cider (alcohol-free: dark root beer layered over sparkling apple juice)
- Bites
- Deviled eggs with a black-olive spider on top
- Pretzel-rod bones dipped in white chocolate
- Mushroom toadstool caps stuffed with garlic and herb cheese
- Black bean dip with blue corn chips
- A charcuterie board laid out on a coffin-shaped cardboard tray lined with parchment
- Mains
- Slow-cooker beef stew, or a mushroom and lentil version, ladled from a black cauldron-style pot
- Baked pumpkin, sage and ricotta pasta
- Sticky blackberry-glazed chicken thighs or roasted cauliflower
- Dessert
- Graveyard dirt cups: chocolate pudding, crushed chocolate cookies and cookie headstones
- Meringue ghosts with chocolate-chip eyes
- Caramel apples drizzled with dark chocolate
- Chocolate cupcakes with white cobweb icing
- No alcohol
- The Restless Spirit: brew butterfly pea flower tea, chill it and pour 4 oz over ice in a tall glass. At the table, each guest adds 1 oz of lemonade and a splash of blackberry syrup and watches the drink turn from midnight blue to violet, as if something unseen just passed through it.
Set the scene
- Cheesecloth ghosts draped over doorframes and chairs (keep fabric away from hot bulbs)
- Battery candles clustered on every surface; they flicker convincingly and can't set the cobwebs alight
- Every clock in the house stopped at midnight, the oldest sign that something has gone wrong
- Mirrors covered with black fabric, an old mourning custom that instantly unsettles guests
- A séance table: a round table, a black cloth, a candelabra of battery candles and a talking board drawn on poster board
- Stretchy fake cobwebs in the corners and across the backs of chairs
- One lamp fitted with a green or purple bulb for a ghostly glow
- Thrifted picture frames filled with printed ancestor portraits, or your guests' character portraits
- A fog effect: set the punch bowl inside a bigger bowl of warm water and dry ice (use tongs and gloves, and never put dry ice in a drink)
- Paper bats flying up the staircase wall
Music
Gothic and playful: candlelit creepy, never terrifying.
- Pipe organ and harpsichord pieces in minor keys for arrivals
- Slightly out-of-tune music-box melodies during the séance
- Solo cello and slow strings under the narrator's rounds
- Theremin-heavy 1950s monster-movie lounge music for comic relief
- Dark ambient soundscapes of wind, rain, creaking floorboards and distant thunder
- Spooky surf rock and vintage Halloween novelty dance tunes for the after-reveal party
Talk the
talk
- Séance
- A gathering around a table, usually by candlelight, to try to contact the spirits of the dead.
- Medium
- Someone who claims to pass messages between the living and the dead, usually for a fee.
- Talking board
- A board printed with the alphabet, numbers, YES and NO, used at séances to spell out messages from beyond.
- Planchette
- The small heart-shaped pointer that glides across a talking board when everyone rests their fingertips on it.
- Spirit cabinet
- A curtained booth from old stage shows where "spirits" rang bells and played instruments. Really, a very clever trick.
- Cold spot
- A patch of suddenly chilly air that ghost hunters say means something is standing there.
- EVP
- Short for electronic voice phenomenon: faint, whispery voices that ghost hunters say turn up on their recordings.
- Codicil
- An add-on to a will that changes who gets what. Rarely good news for everyone.
- Dumbwaiter
- A tiny hand-pulled elevator for sending food between the kitchen and the dining room, and a perfect secret passage for small objects.
- Memento mori
- Keepsakes, like skull rings and lockets, meant to remind the living that life is short.
- Gothic Revival
- The pointed-arch, spire-topped style of architecture that makes any mansion look haunted.
- Jack-o'-lantern
- A carved, candlelit pumpkin, traditionally set out to scare off wandering spirits.
Who’s in
the room
The Heir
Stands to inherit the house, the fortune and, apparently, the ghosts, if they can make it through the night.
The Medium
Speaks for the dead, charges the living, and always seems to know a little more than the spirits should.
The Skeptic
Here to debunk everything, and suspiciously handy with wires, mirrors and hidden speakers.
The Loyal Retainer
A housekeeper, butler or groundskeeper who knows every creaking stair and hollow wall in the house.
The Ghost Hunter
Armed with gadgets, a camera and a desperate need for proof, whatever it takes.
The Outsider With Paperwork
A real estate agent, lawyer or appraiser who sees the mansion as a price tag.
The Black Sheep
The relative nobody invited back after last Halloween, who came anyway.
The Keeper of Records
A historian or archivist who has read every letter in the attic and knows which family stories are true.
Hosting
timeline
3 weeks before
Pick your date (the weekend before Halloween is often easier to fill than the 31st), create your case and send the private invite links with the dress code "gothic finery or your best ghost."
2 weeks before
Costume nudge: remind guests that a hooded cloak, or all black plus some cheesecloth, is plenty. Invite them to add a selfie for a portrait in the gothic storybook style.
10 days before
Raid the Halloween aisle while it's still full: battery candles, cheesecloth, stretchy cobwebs, skeleton keys and a black tablecloth. Decide whether you'll play a suspect or run the game as the master of the house.
3 days before
Shop for the menu. Make the stew and the dirt cups ahead, and freeze the ice hand for the punch. Print the optional print-at-home kit if you'd like name tags and place cards.
Party day, afternoon
Build the séance table, stop the clocks at midnight and cover the mirrors. Test the narrator audio on the TV with the lights low to make sure the captions are easy to read.
Party night
Greet guests by candlelight with the graveyard punch, start the opening scene once everyone is seated, then dim the lights a little more each round. Switch off the lamps entirely for the reveal.
The morning after
Share the party recap in the group chat, then pack the cobwebs away for next year.
Questions
How scary is a haunted mansion murder mystery?
Spooky-fun, not horror. The story is PG-13 with no grisly details: think creaking doors, a stopped clock and a knock from the wrong side of the table. You control the chill with the lights: dim them and add flickering candles for more shivers, or keep the lamps on for a cozier, funnier night.
Do guests need a period costume, or will a regular Halloween costume work?
Either works. Gothic finery fits best, but the cast mixes old-house characters with modern visitors like a ghost hunter and a real estate agent, so a flashlight and a cardigan count as a costume. A hooded cloak over anything instantly looks the part.
Do we need a real talking board for the séance?
No. Draw the letters, numbers, YES and NO on poster board and use an upturned glass or a cardboard heart as the planchette. It's there for atmosphere: the mystery itself unfolds through the narrator audio, your characters' secrets and the Evidence Locker.
Should we host on Halloween night or the weekend before?
The weekend before is often easier for guests with trick-or-treat duty or other parties on the 31st. If you do host on the night itself, start a little later so the doorbell has stopped ringing before your séance begins.
Do I need a big old house to pull this off?
Not at all. Any living room works once you lower the lights, add battery candles and drape a few cobwebs. The narrator audio and captions on your TV or laptop do the rest of the scene-setting.
Can the host play a suspect?
Yes. You can play one of the suspects alongside everyone else, or run the game as the master of the house, opening the séance and keeping the rounds moving.
Host a Haunted Mansion mystery
Pick a theme, add your guest list and see your cast in seconds. The preview is free.
