Rough Walkthrough (Spoiler Warning) video - The Intersection mod for Amnesia: The Dark Descent

You are Ezra Fischer, a wealthy jailer at Munich, Germany. One day, quite suddenly, a mysterious man by the name of Albert Luther began to purchase large swaths of your prisoners for vague reasons regarding 'needed laborers'. He paid you handsomely, so it was easily brushed off. However, the secretive nature of his operation, and his lack of a response to any of your letters began to make you suspicious. After several reports, and anomalous events, it becomes clear that something ancient and evil is being released into your world, with it's origin at the very place where you sent your prisoners. You leave everything behind one night to resolve it all.