You are in a dark room, you have no memories before waking up here. There is a single fortified door, it is locked and requires a key. The labyrinth of halls has many dangers and horrors, but the voice in the headphones helps you to stay safe. The big secret (only revealed at the end!!!) is that the dungeon is run by a sentient computer, which produces the voice you hear in your headphones. It helps you defeat the mastermind.