The Missing Key: the Practice Case
A small mystery at a winery, with no murder at all. In a single chapter, it shows you everything you need for the full stories.
Updated

- 1 chapter
- no murder
- teaches the rules
- plays offline right away
This page reveals no culprit and no solution.
The setup
Seven a.m. at Rebenhang Winery: the first harvest is about to begin, but the master key is missing. Without it, the equipment shed stays locked. Clara, Tom, and Nele have been at the winery since six.
It’s your first day helping with the harvest, and you only arrived at seven. Winemaker Ida Reuter asks you to work out where the three were at 6:30. Who was alone with the key?
What you’ll learn
After the prologue, the case file introduces the key, the three people, and your role. Then you learn the sudoku rules with a small 4×4 puzzle.
Then you place three people on a 4×4 floor plan: exactly one per row and column. Instead of a victim, there’s a target: the key. It sits on the one square left free at the end.
The practice case comes with the app and works offline right away. You can also play it in your browser and leave at any time.
Silence at Lindenrain
After the practice case, your first full story is waiting: Silence at Lindenrain. A manor house reception, and a president who never lives to see it. Reconstruct his final day.