This is a little straightforward story-driven parser game. You play the role of Jon Doe, probably the best MI5 agent. You are given an assignment: Investigate the death of an informant employed at a tech company. There are puzzles but they are mostly easy. The game takes place in small areas, which you never return to, so you don't really need to make a map.
I found the writing to be good and sufficient for this kind of game. The implementation was usually good, though a few places, there could have been more responses to the things you can try, especially conversation. However, I managed to complete the game without hints, so it never became a big issue. Overall, I found this to be a very good game.