The laird's letter is gone.

Ardmore Castle, the night of the ceilidh.

At twenty-five past nine the laird locked a sealed letter in his study: his decision about who inherits the estate. At ten o'clock it was gone.

Between half past nine and ten, three guests went upstairs: Theo, Priya and Idris. One of them took it, and is lying to you.

You have 8 questions for all three, asked in your own words. Clues turn up as you go. When you're sure, accuse, and stake points on it.

In this preview the suspects answer from lines written for the case; AI suspects are switched on only in testing. The rules decide what counts.