Although I'm skipping every single cutscene or dialogue in this walkthrough, it still contains heavy spoilers!

This video shows how to gain a S Rank in the first Episode of Karma Flow - The Prototype.

The first episode is a sort of tutorial mission. The player has to infiltrate the Parisio Hotel and locate the room where the target, Bennet Wasel, is stationed before dawn.

It doesn't offer the same amount of freedom of action as the other missions, but there's still more than one route to take towards the mission objective. For this walkthrough, I've decided to take the long route. You could also go for the Hotel's main entrance if you feel bold enough! xD