This demo is what is known as a "vertical slice": a demonstration in one level (the police station) of the core features of the game. This level is not the one in which the story begins in the final game, but it's the best suited level for this purpose. That's the reason why, this time, the technical/functional aspect is given greater prominence than the narrative twists and turns.

It is highly recommended to read the (very) short user manual before to start the demo!