The Sorve at dawn: the river, the poplars, the lock and the heron

A playable investigation series · Season 1

FilatureLe Héron

She disappeared on a Tuesday. Follow her trail, one clue at a time.

Lou has stopped answering. Her sister Camille messages you, and you do the searching: you dig through a fake internet, pin what matters and answer the questions. Six episodes of about 25 minutes, beside a river that doesn't exist.

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iPhone and iPad · iOS 17 or later · episodes in French for now, interface in English and French

Season poster: a paper-cut grey heron on a kraft folder, in front of a lock in the mist

Bérange. Tuesday 3 March, 6:32 am. Lou Ferrand photographs a heron by the lock. That evening, she doesn't show up at her sister's birthday dinner. Her phone is off.

Episode 0 · First contact

It starts with a message.

No rules screen: the first time you open the app, Camille messages you on Pigeon, the fake internet's messenger. Answer her, and you know how to play.

In an episode

  1. ReadCamille's file: messages, posts, articles. A written voice-over opens the episode.
  2. SearchLimier, the fake internet's search engine. A name, a handle, a place: every page opens another.
  3. PinWhat matters goes in the notebook, and the notebook follows you from one episode to the next.
  4. AnswerFive questions per episode. The yellow banner always reminds you what you're looking for.
Profile picture of Camille Ferrand, a fictional character
Camille FerrandPigeon · messenger

Thursday 5 March, 9:02 am

Hi. Sorry to message you out of the blue, it's Camille.

Lou didn't come to my birthday on Tuesday evening. Her phone has been off ever since.

Try it, right here

The first question of episode 1.

The real question, the real exhibits, the real hints. Open the photo's metadata.

To find · question 1 of 5

Where did Lou take her last photo, at dawn on Tuesday?

Profile picture of Lou Ferrand, a fictional character

Lou Ferrand@lou.ferrand · Tue 3 Mar · 6:40 am

Herons always leave without a sound.

Photo posted by Lou: a grey heron flying in the mist, above the lock
Where did Lou take her last photo, at dawn on Tuesday?

Translated for this page: in the app, the episodes are in French for now.

Season 1 · Le Héron

Six locks on the Sorve.

The season reads like a river: one lock per episode, passed in order. The first two episodes play from installation. The other four are already in the app, sealed: one opens each week, on Tuesday, Paris time.

  1. Episode 1 title card: an empty riverside café table, a heron flying past

    You start here

    1. Un mardi

    Lou doesn't show up at her sister's birthday dinner. Her phone has been off since dawn.

    Play20 min · From installation

  2. Episode 2 title card: a paper-cut heron on a kraft folder

    2. Le héron

    An ex who swears he did nothing, and a bird that comes back to the same spot every morning.

    Play25 min · From installation

  3. Episode 3 title card: a plot of land by the water, in torn paper

    3. Pré-Mouillé

    A plot of land, a report, a missing signature.

    Sealed25 min · Out on a Tuesday

  4. Episode 4 title card: an empty road between poplars, in the mist

    4. Saint-Préval

    A little yellow car and a road in the mist.

    Sealed25 min · Out on a Tuesday

  5. Episode 5 title card: a drawing of a heron in the mist of a harbour

    5. L'estuaire

    A town by the sea, and someone protecting their sources.

    Sealed25 min · Out on a Tuesday

  6. Episode 6 title card: a heron above a footbridge

    6. Le retour

    One Friday morning, the paper comes out.

    Sealed25 min · Out on a Tuesday

Changing your iPhone's clock won't help: an episode's key comes from a server that refuses it before release day. Once obtained, it stays on your device.

The thread: the river drawn on kraft paper, a red thread and tags tied to it

Mini-game · Trace the thread

One closed episode, one round: put it all back in order.

Each closed episode leaves you its traces in a heap: posts, messages, photos, articles. Tie them to the thread in the order they were left. A photo counts at the time it was taken, not when it was posted.

Tap a trace to tie it to the thread, earliest at the top. Tap it again to untie it.

The traces of episode 1

The thread

  1. Trace 1
  2. Trace 2
  3. Trace 3
  4. Trace 4
  5. Trace 5

And every day, the daily thread.

A round of six traces, drawn each day on Paris time. It only draws from episodes you've already closed, so it can't spoil what comes next. Closing the first episode opens it.

  • Plays offline; the streak only counts days checked against a signed time
  • Shared as squares, daily-game style: never a trace, never an answer
  • The season's great thread, eight traces, opens after two closed episodes
What you share (example)
Filature · Daily thread #4
🟩⬜⬜🟩⬜🟩
🟩🟩🟩🟩🟩🟩
Traced in 2 tries · from memory
App screenshot: the daily thread, six traces to tie to the thread

The people of Bérange

Everyone has left traces.

A town of 20,000, invented from end to end. Here are the profiles you'll meet in the first two episodes. Others are waiting further down the river.

  • Profile picture of Lou Ferrand, a fictional character
    Lou Ferrand@lou.ferrand27, hydrologist. Rivers, birds, black coffee.
  • Profile picture of Camille Ferrand, a fictional character
    Camille Ferrand@camille.ferrandHer older sister, a night nurse. She's the one messaging you.
  • Profile picture of Bastien Roux, a fictional character
    Bastien Roux@bastien.fournilLou's ex. Baker at the Fournil du Quai, up at 4 am.
  • Profile picture of Yvan Kessler, a fictional character
    Yvan Kessler@yvan.eclusierRetired lock keeper. Feeds the ducks at dawn.
  • Profile picture of Jo Mallet, a fictional character
    Jo Mallet@jo.malletLou's colleague and friend, a cartographer.
  • Profile picture of Mehdi Saïdi, a fictional character
    Mehdi Saïdi@mehdi.mitronApprentice at the Fournil du Quai.

Fictional characters, portraits created for the game: none depicts a real person.

Real screenshots

The app, screen by screen

Fiction

The rule of the game

An investigation game. Never a search for real people.

Filature teaches you to cross-check traces in an entirely made-up world. Nothing in the app points to a real person, address or website, and there are no outgoing links.

Characters
All declared fictional. Their portraits were created for the game.
Sites and networks
Limier, Piaf, Pigeon, Bérange Infos: made up. Their .fict addresses lead nowhere.
Places
Bérange and its river, the Sorve, don't exist. Photo coordinates land in the open sea.
Numbers
Fictional numbers, reserved and unreachable.

An investigation with no violent scenes, written with care for the worry of loved ones. If someone close to you really goes missing, go to the police, not the internet.

The Sorve at night, one lit window by the lock

Credits

The notebook
pins, red threads and notes, from one episode to the next
The hints
three steps: where to look, deduction, answer
The report
one box per question, and the “No hints” stamp
The share card
your report without a single answer
The widget
the current episode, or the days until the next
The notifications
new episode or reminder, only if you turn them on
The achievements
Game Center, if you like, never required
Sounds and haptics
the heron's cry, the tightening thread, all can be turned off
The shortcuts
“Resume the episode”, “Next episode”
Offline play
an opened episode plays without a network
The kraft desk and the screening room
light or dark, Dynamic Type, VoiceOver

To be continued…

Camille is waiting for your answer.

Six episodes, a fake internet, a thread to trace every day. Free, no ads, no account.

Coming soon to the App Store