Step Into the StoryComing Soon

Six people. One road. It went at midnight.

Ardenfell Observatory sits on an upland plateau, ninety kilometres from the nearest town, reached by a single road that crosses a shallow river at a low-water ford. Six people were there for a three-night observing run. On the second night, the rain didn't stop, the ford went under, and the only way in or out of Ardenfell disappeared with it.

Somewhere around 02:00, Dr. Miriam Hallam — a revered astronomer on what everyone knew was her last observing run before her health ended her career — fell roughly seven metres from the exterior catwalk of the main dome onto the concrete below. It should have been a tragic accident on a dark, badly-lit walkway. Then the site manager's own report mentioned a catwalk gate that shouldn't have been open, and a witness account that didn't quite hold together.

It was forty hours before the road was passable again and anyone official could reach the site. Forty hours, six people, one building, and — for at least one of them — the growing certainty that somebody in that room had probably killed her.

Forty hours is a long time to get your story straight

You're detectives with the Hartsmere Constabulary Major Crime Unit, brought in the moment a probable accident became a suspected homicide. But this isn't a scene anyone preserved for you. The first accounts were taken over a satellite phone by a non-police first responder, and by the time you actually arrive, six people have had forty hours together to talk, to tidy, and — whether they meant to or not — to align.

What you get instead is something better than an untouched crime scene: a set of very human, very self-interested statements, and the one category of witness at Ardenfell that had no motive and no forty hours to reconsider anything — the observatory's own machines. Dome rotation logs. Instrument exposure logs. A power event log. A long-exposure camera pointed at the sky the whole time. None of them can lie, and none of them are on anyone's side.

Everyone at Ardenfell had a reason to be up there

There's a visiting instrumentation scientist commissioning new equipment, with a professional history nobody on site actually knows. There's a postdoctoral researcher whose entire career is riding on this run's data, and who's worked out something about Miriam he's not saying out loud. There's the site manager — twenty years at Ardenfell, the only person who holds a key to that catwalk, and the only one who knew exactly which section of handrail was unsafe. And there's a technician who lied about being asleep, and a science journalist Miriam had threatened to freeze out of a story that mattered to her.

Opportunity doesn't help you here — everyone on site had it. This one gets solved on means, motive, and the moment a person's own account stops matching what a machine wrote down.

What you'll actually be doing

You'll build a reconstruction grid — six names down the side, the hour that matters across the top — and fill it in twice: once from what each person says, and once from what the site's own systems recorded. Somewhere in that grid is exactly one cell where those two versions cannot both be true. You'll need warrant access into the site's own mail system, a production order for an off-site university record no one at Ardenfell could have touched, and a password assembled from two documents that, on their own, have nothing to do with this observatory at all.

By the end, you'll need to state — clearly, and against a docket that either holds or doesn't — who is responsible, what actually happened on that catwalk, and why. Rule out the obvious answer first. It's there for a reason.