Roadside Hotel Dossier is a set of two missions for FIST.
The PDF is 9 pages, and deliberately styled to look like a set of bureaucratic documents. This styling makes it a little hard to read and use as a mission, but adds a great sense of immersion and some meta commentary in the form of scrawled notes. It's a neat flourish.
The first scenario is a simple undersea skirmish against a thing that is using a submarine as a hermit crab would a shell. The second is a more adventure-y arctic exploration with a unique status effect, challenging but intermittent foes, and a more open ended final objective: negotiating with Thoth. It's by far the stronger of the two, but the first is also great as a shotgun scenario or an introduction to FIST.
Overall, if you want to add some FIST missions to your dossier, you should pick these up. The slight difficulty in reading them is more than offset by their quality, and they should be a good experience with any group.