Clue is in the title. You are a hitman. More specifically a hitman with no memory, taken in by Rent-an-Assassin Ltd. Having never played a Hitman game, this has an excellent tutorial that not only teaches the basics, but how to complete an objective in multiple ways, which is the core focus of the game. There are 6 locations (originally released separately as DLCs to the base game which only came with 1 mission) which feels like a good length for someone who wants to play around a bit but still be able to finish the game and still has tons of replay value for completionists. However, it effectively has no ending and finishes with a cliffhanger.