You are standing in the castle's main hall. There is a large fire burning in the open fireplace and you approach it to warm yourself. As you do, you survey your surroundings.

At the end of the long hall, there is a closed door with light coming from underneath it.

To your left there is a winding staircase leading to the

Do you (a) climb the stairs to the next floor or (b) go through the door towards the light.

Go upstairs Open the door