The game is set in an American metropolis of the early 20th century right after the Spanish flu epidemic. It takes place in a skyscraper full of fashionable Art Deco apartments, built by an eccentric millionaire (who is actually an occultist and the head of a mysterious cult).
Once the skyscraper is built and finally opened, its owner runs the great ceremony and invites many different people. But on that night, something mystical happens and transfers the building with all its inhabitants into a nightmarish reality, where the laws of physics, chemistry, and space are broken and time is collapsed.