A loss-of-memory scenario, presented without any system rules, and using descriptive terms to make it easy to adapt to whatever RPG system you prefer.
The PCs awake the morning after fulfilling a promise to a stranger, but can't recall the events of the previous night, or how they ended up where they are. The story influenced by personal mystery films such as Memento and Identity, and would be an excellent evening's RPG session with the right sort of players.
The entire doc has a very professional look to it, and the handouts are excellent (though not of much use to anyone without a color printer). The appendix includes tips for running the scenario in the 1920s/30s, and making it fit in the Call of Cthulhu mythos.
It's a very well-produced package, and I will definitely look into other releases by this publisher, based on the quality of this one.