"Deadeye" is not story-heavy. All you should know is that there is small gang of street thugs and their leader is the one you should either kill or take for ransom. The mission is essentially small (you can complete it in 12-25 min.) but twisted corridor with occasional branches, and obstacles - both passive (like doors or candles) and active (guards). But id does good job with its content: combining well-placed light-sources (which you can't take and transfer into more safe location), and simple yet effective patrolling paths of guards, traversing their hideout. The "ransom" optional is especially hard to complete and is truly a challenge - especially if you are trying to ghost the mission.