Looking strange dream last night

I saw a very strange dream after a long time.

Here is somewhere countryside, time is looking like afternoon, I and my friend go into the forest together. Then a cave suddenly appears front of us… We don't hesitate to go inside because we can look a light from the other side of the hole. We could go through other side as we are digging a gravel by our hands. At last, we exit the hole and we just look a wooden building front of us. This building looks like old wooden school building…

We go inside the building and we can see some of people who queue front of a certain office. I soon feel very strange feeling from them and I think, there're many strange persons in the office. We want to go through this office but office door is open we will find inside persons when we go through… I request to enter inside a room to my friend. My friend accepts my request and he go inside!! But he soon flies out to the corridor and he said, "Let's go out here and we have to return back to the hole right now. I'll explain anything after return through the hole!!"

We run to the hole and we soon return inside together. The hole is closed we dig a gravel very hard but we can't go through the hole at last!! I said, "We cannot return and this hole is gradually buried. Hurry up to get out this hole." Reluctantly, we go back to strange world again. What should we do after this… Should I try to enter the strange room for understanding anything or not?

I don't know but I understand gradually. This world is different, for example time is long. A day time is 24 hours in our world but this world is twice as large long as our world thus it's over 48 hours. In other words, this world is not our life. Can we go back to our world?