This dream took place at a multi-purpose building that had a hotel or apartment where I was staying with most of my family.
At some point in the dream I returned to our hotel or apartment that had a door at the front and a door at the back, there was a knock at the front door so I answered it, and at the door was what I thought was my family; but they did not say anything.
There was then a knock at the back door, I answered it, and once again my family was at the door except they spoke this time.
I asked them how did they get to the back door when I had just opened the front door for them, they had no idea what I was talking about, and then I realized that maybe those were impostors at the front door.
I told my assumed real family as we probably tried to escape out the back door because I was not sure what or who those assumed impostors were or what powers they might have or what their intentions were, I was afraid that maybe they were going to kill and replace us or something if they were shapeshifters or something like that; but I woke up.
The end of this dream took place during the night, and my brother GC and I went to a multi-story dock with ladders leading up to either another floor and / or a bridge with a building further along the left side of it.
I can not remember what we were doing or anything, I just remember finding something on the ground as GC was leaving, and then we heard voices from above from the building on the other side of the bridge like they heard some noise and were checking it out.
My brother GC was already crossing over to the other side but I was still down below, so I hid a moment before climbing up, but then I woke up.