The short of it is that I enjoyed playing this game and you should try it!
As you might expect from the description, this game has a grim tone. The description above is repeated at the beginning of the game, but beyond that there is not a specified setting. In Q&A with the creator he confirmed that this was his intention, and that Warhammer inspired him. Personally, I like to have a bit of setting to go on but know that this differs per person. My initial inspiration was the movie Priest based on the initial description, flavor from the skills & gifts, and the foes list. As I played the game, I had to ask a few questions related to mechanics, which the creator was happy to answer. At a certain point I used a location generator for more flavor, but overall, the mechanics work well by rolling 2 skills to use as a focus to generate an encounter. As is, the system is good for 1 shots or short story arcs unless you wish to do some worldbuilding and addition of spells, foes, and other needed flavor.