The lore behind this is basically, you wake up in a "Unfamiliar place." With the pearl drone, you go to floors with a sanitized octoling keeping watch in the elevator while you complete floors. Named Acht. At floor 10, Marina is brainwashed and you have to save her. After defeating order, your next objective is to find your brother. Dust on the 30th floor, as a brainwashed parallel canon. Maybe you can save him, maybe you can not?