The premise
Meridian Heights is a glittering, corrupt coastal city of old money and new crime, and the score of a lifetime is locked inside the Argent Reserve beneath the Castellan Tower downtown - a bank for people who cannot keep their wealth anywhere legal, holding cartel cash, stolen art, blackmail ledgers, and one thing you have a personal reason to take. You arrive a thief, a grifter, or a specialist with a target in mind and no crew yet to pull it off.
This is a caper first: casing the mark, recruiting specialists with their own agendas, sourcing gear, working the angles, and surviving the double-crosses a score this big attracts. The Diamond Syndicate, the crime outfit that secretly owns the Argent Reserve under kingpin Victor Castellan, must never know a crew is coming. The Blue Room Irregulars are the city's pool of professional thieves you must recruit and keep loyal - among them the legendary retired box-man Silas "The Ghost" Vance, who will only come back for the right job. Delphine Roux fences what you steal and profits whether you live or die. Detective Ramona Vasquez's underfunded Major Crimes unit has been trying to put Castellan away for years and might be your worst enemy or your unlikeliest ally. And the unseen Argentum Council are the true power in the city.
The clock is real - the one thing you came for is only in the vault for a window of days. The crew has its own loyalties and debts, the task force is closing on Castellan, and somebody at the table is already planning to take the whole take. Assemble the crew, case the mark, run the job, and survive the inevitable betrayal when the split is on the table.
What this world plays like
Your first ten turns are the pitch and the people: a night in the Blue Room, a specialist you need who needs something first, a look at a target that should be impossible. You make a contact and an enemy you don't recognize yet. The city is already keeping the ledger.
By turn fifty your standing with the Diamond Syndicate, the Blue Room crew, Vasquez's task force, and the dock union is tracked as real attitude, and the cut you promised on turn nine decides who covers you when it goes loud. The fence you stiffed remembers. A piece of the plan you cut to save time becomes the hole everything falls through.
By turn one hundred the job is in motion and so is the betrayal. Whoever you recruited, whoever you crossed, whoever you owe, the city collects - and a crew this size never splits clean.
The Vault Job does not reset between sessions. Close the tab. The vault is still down there, and so is what you came for.
Factions in motion
The Diamond Syndicate
A ruthlessly efficient criminal enterprise that operates like a modern corporation, controlling the city's high-level narcotics, money laundering, and protection rackets. Led by the charismatic Victor Castellan, the Syndicate seeks to monopolize the underworld, viewing the 'Old School' codes of honor as outdated liabilities. They are the public face of crime in Meridian Heights, but serve secret masters.
The Blue Room Irregulars
A loose affiliation of elite freelance criminals—thieves, hackers, and fixers—who adhere to a strict professional code. They use The Blue Room, a discreet speakeasy, as their neutral ground for networking and taking contracts. They value reputation and skill above all, representing the 'Old School' of the underworld in direct opposition to the Syndicate's brute-force monopoly.
MHPD Major Crimes Task Force
A small, under-funded, but fiercely dedicated unit of detectives operating out of the 12th Precinct. Led by the obsessive Detective Ramona Vasquez, the task force is the only significant legal opposition to the Syndicate's expansion. They operate in the gray areas of the law, using informants and surveillance to build a case that can withstand the city's corrupt judiciary.
Quaymen's Union, Local 44
The labor union representing every dockworker and crane operator in Port Victory and The Quay, giving them a stranglehold on the city's shipping lifeblood. Publicly, they fight for workers' rights; privately, they run a profitable smuggling and extortion racket independent of the Syndicate. They are fiercely territorial and distrust all outsiders, viewing both the cops and the Syndicate as equal threats to their business.
The Argentum Council
The true, unseen power in Meridian Heights. Comprised of the heads of the three founding 'Old Money' families, the Council manipulates the city's politics and economy from their Silvercrest Hills estates. They view the Diamond Syndicate as a necessary, if brutish, tool for enforcing their will and handling ventures too dirty for their public portfolios.
People you'll meet
Delphine Roux
Victor Castellan
Ramona Vasquez
Silas 'The Ghost' Vance
Margo Chen
Lester Thorne
Places that matter
The Meridian
The glittering heart of the city, a forest of glass and steel towers where corporate power and Syndicate ambition intersect. By day, it's a bustling hub of finance; by night, its neon-lit canyons are prowled by those who own the city. The Castellan Tower dominates the skyline, a monument to the power of dirty money.
Silvercrest Hills
Sprawling residential hills overlooking the city, where old money lives in secluded mansions behind high walls and private security. The streets are quiet, clean, and constantly monitored. Every gardener or maid is a potential informant for someone.
Port Victory
The city's legitimate commercial face, a district of upscale shopping, theaters, and public parks that buffer the Meridian from the grittier port districts. It's the neutral ground where the city's two halves meet for lunch.
Saint Anne's Preserve
A massive, undeveloped state park of dense forest and rocky coastline that forms the city's northern border. Official trails are few, and the deep woods are a place where things, and people, get lost permanently.
The Ironworks
A district of aging brick warehouses, defunct factories, and working-class homes, perpetually covered in a fine layer of rust and grime from the sea air. This is the industrial gut of the city, where things are made, broken, and fenced. The Overgrown Ruins section is a collapsed factory complex, a no-go zone even for cops.
The Quay
The loud, chaotic, and sleepless harbor district. A maze of shipping containers, dive bars, union halls, and transient housing. The smell of diesel, salt, and fried fish hangs heavy in the air. This is where contraband enters the city and where crews are born and broken.
A real turn from this world
Silas "The Ghost" Vance turns your folder over without opening it. "I did the Reserve's sister vault in '09. Walked away clean and swore I'd never touch a Castellan box again." He finally looks at you. "You're going to tell me why this one's different, and it had better not be the money, because the money's never worth what Victor does to you when it goes wrong." Behind him the Blue Room goes on pretending not to listen.
He is the best in the city and the most likely to walk. Which he does depends on the next thing you say.
Standing with the Blue Room Irregulars: pending. The crew logs who the Ghost sits down with. So, eventually, does the Syndicate.
Why The Vault Job holds up over a long campaign
Most AI roleplay tools are built around a single session. They start to fall apart at hour ten and are barely playable at hour fifty. The Vault Job doesn't, because the world isn't living in a chat history - it's living in a database.
Mechanical truth in Postgres. Coins, inventory, NPCs, factions, locations, properties - all in real database rows. The narrator describes around the database; the database is what's true. By turn 500, your business ledger still balances and your apprentices still have the names you gave them.
Hierarchical chapter compression. Every chapter compresses into a tight summary; summaries compress into act-level summaries. The hundredth turn can pull a relevant detail from chapter two without flooding the context window.
Semantic memory. Important moments are embedded as vectors. When the current scene references an old promise, the engine retrieves the exact exchange where that promise was made - even 800 turns ago.
You'll be asked to choose Quick Start or build a character of your own.