The Eve, 20:00 | Japanese-Style Murder Mystery for 8-16 Players + Host | Printable PDF | 150-180 min

THE EVE, 20:00 — a Japanese-style murder mystery for 8–16 players and 1 host. 150–180 minutes. Printable PDF.

Tsuzuri is a town of thirty houses along a river. Tomorrow is its festival, and tonight is the eve.

The festival has a river crossing — the portable shrine is carried into the water and across. It has run for two hundred years, and for the last ten, outsiders have come to watch it.

Keizo Hiwasa, seventy-eight, has run that festival for fifty years. Since this morning he has been telling people he has something to say tonight.

At twenty hundred the music stops and he is not in the committee house. Two people go out and find him on the riverbank behind it, face down on the stones.

The one police constable is at a fire in the next town and will not be back until morning. At six tomorrow morning, the storehouse doors open and the shrine comes out.

Before then, eight people have to settle two things. What happened tonight, and whether they cross the river tomorrow.

WHY IT WORKS AS A CLASSROOM ACTIVITY

• Close reading with stakes. Every clue is a document students have to read carefully. Missing one detail changes who they accuse.
• Evidence-based argument. Players make a claim, cite the document it came from, and defend it against the other readings at the table.
• Structured discussion. Fixed phases — reading, discussion, investigation, final discussion, resolution — so the conversation does not drift.
• Built for a large group. Eight roles, and up to sixteen players in pairs — so a full class can run as one table instead of splitting into several.
• No preparation beyond printing. The host script is written to be read from the top. No rules to adjudicate, no dice, no components to assemble.

HOW THIS DIFFERS FROM A MURDER MYSTERY PARTY KIT

If you have run a boxed “murder mystery dinner” before, this is a different genre. Please read this before buying.

• The host does not play. They run the game. That is what lets the story hide information the way it does.
• Each player gets a private booklet with a secret only they know, and two goals — one shared with the table, one private.
• The culprit is a player, not the host, with their own goals to pursue.
• Single use. Once a group knows the answer they cannot play it again — but you can run it for new groups as often as you like.

WHAT YOU GET (14 files, 13 of them PDF)

A read-me for everyone, a host script with the full running order and read-aloud text, the evidence set, one private booklet per character, and a plain-text version you can paste into a video call or a shared document.

WHAT YOU NEED

8–16 players plus one host, 150–180 minutes, and either a printer or a shared screen. First-time hosts can run this. Everything prints in black and white on ordinary paper.

CONTENT NOTES

Deals with a death and with a town’s decision about its own tradition. No gore or violence is depicted. The town, the festival, the characters and the shrine in this scenario are fictional. Suitable for high school and adult groups.

LICENSE

Classroom and club use is fine, including running it for as many groups as you like. Streaming and let’s-plays are allowed, monetized or not. Please do not redistribute or resell the files, claim authorship, or post the solution publicly.

HOW THIS WAS MADE

This scenario was written with the assistance of an AI language model (Claude, by Anthropic), then edited, structured, and consistency-checked by a human before release. The plot, characters, clue structure, and all text were reviewed by the maker.

Ai-Q Labs makes murder mysteries in which all the evidence is text — a corrected page proof, a radio log, a weather record. Check out Ai-Q Labs for the rest of the series.