Very interesting dream, thank you for sharing.

One thing you can do is list your associations to each part of the dream. If you do so, I'll use them to get a better feel of what the dream is saying as a whole.

So for example, does being in a white hallway call anything to mind? Does the color white itself call anything to mind? It can be literally anything you associate with these dream images.

Does a floor with wooden planks make you think of anything?

Does this entrance to the attic make you think anything? Is it something you've seen before?

What do you associate with this man standing over you? Remind you of anyone you've seen? If you were to think of personality traits he might have, just use your intuition to see what clicks. Don't worry about being confident or right, just give it a try.

What do associate with holding an axe?

With half a face stitched on him?

One comment I will make now is that part of the dream seems to be exploring your father's identity, your sense of who he is. First, he appears in the guise of an unfamiliar person. Then he appears with two different halves of a face, as if he is possibly two different people (i.e., in real life he has different sides to his personality).

I also might ask what your relationship with your father in real life is like.

Mike