What Does This Persistent Dream Mean?

Guys, what does this persistent dream mean? And ftr, Roisin is a girl I like. I have been having it a lot lately, basically, I am some kind of guardian of a spiritual house, the spirits are shown via candles. People go into the house with me and if they are evil, the doors lock, windows bar, candles go out and the evil person is destroyed, I want to know what it means, it seems like some kind of movie thing, perhaps it could be called The Evil House but I dunno, it has been bugging me, last night, one of the people who went in was Roisin and I had to make sure she wasn't destroyed so I had to stick with her to make sure that she did not even think about Evil thoughts, and when she did, I had to go through a chanting ritual to stop the candles going out which took a lot out of me, what does it all mean, I am all confused :S Someone please help me understand