I had a dream last night that I was on a strange planet. It was similar to Earth but all the cities were enclosed. All of a sudden I was running through a building, up and down stairs until I came to a door. Inside were all these young men in their twenties. I knew I had to rescue them because they were slaves. I got them all out with the help of a woman I knew in the dream. One young man in particular was very shy and quiet and frightened and when we got back on our ship (some sort of boxy space ship thing) I had to take care of him and comfort him. Then I woke up.
The whole dream was so vivid and I remembered all these details. I have never had such a vivid dream before.
What does it mean?

The main theme of the dream seems be about protecting yourself or someone else from a threat.

The enclosed cities sound like they represent a need to be protected.

In the dream,when you were running, did you feel like you were running away from something, or were you running toward something? Running away from something (being chased) can have to do with not facing an important issue in your life.

I'm guessing that when you refer to "young men in their twenties", you are implying that you are much older. The dream could be about needing wisdom and maturity to deal with a threat or a problem.