This product has two components: a Game Master's screen and a book containing an adventure and some additional rules. Depending on whether you've gone 'dead tree' or electronic, you either get a cardstock screen and printed book or two separate PDFs to download.
The screen has some useful tables - the ones you are likely to need most often during combat - on one side and some quite dramatic art on the player-facing side. If you have gone for the electronic option, you'll have to print these out and stick them on card for the full effect, of course. Whilst pleasing to the eye, the art is dark and will use up a lot of ink - it may be best to have it done at a copy shop, or decide that you just want the tables for your own convenience. They are in greyscale, clear and easy to read.
The adventure is called Maggots in the Meat. It's set on Acerage, a backwater planet within the Imperium with a feudal ruling structure and hordes of quarrelsome lordlings perpetually squabbling over who is in charge of what, even more so since the High King died without troubling to name a successor! However, this is of no direct interest to the Imperium as long as tribute is paid and the world's surplus food output supplied...
The adventure itself begins with the party of Acolytes (it's suited to 1st or 2nd rank ones) being sent to investigate reports of 'unnatural' attacks on citizens of one lordling's domain, rumours of 'daemons' and 'monsters' fly around and it's their job to get to the bottom of them. Needless to say, the region in which they will have to conduct their investigations is being fought over at the moment.
There's a lot of atmospheric description of the areas they have to visit, along with people to interact with and rumours to pick up in the course of their investigations. Enough is provided to enable you to steer them in the right direction to the source of the problems, and there are plenty of opportunities to brawl along the way, never mind the likelihood of a spectacular combat with said source once they find it. It's a good open-ended adventure with options for you to take it in whatever direction you please, including suggestions for further adventures.
There's also an Appendix which contains details of a xenos (alien) race, rules for creating your own aliens - which can, of course be a sentient race or 'monsters', alien animals to fight, as you need, and a section on poisons and toxins. This includes a list of 'Infamous Toxins of the Calixis Sector' and their effects.
The adventure is good fun, with plenty going on yet open enough for you to run it in a fairly sandbox style to enable the characters to conduct their investigations however they please. The xenos generation system is excellent, and should come in useful whenever you need an alien monster (or race).