Do you mean a dream like a personal life goal type of thing or one of those sleepy time stories in your head, because I had my first brewing one last night. I've been planning my first lager. So, in my dream, I was in the middle of the mash only to realize I didn't have a lager yeast. So, I decide to brew it as an ale and brew the same grain bill in a few weeks as a lager. I later found that I did have lager yeast only to realize I never checked my mash temp and I was mashing at 130 degrees.
I woke to my wife shaking me and asking me if I was okay. Apparently, I was sobbing uncontrollably.