In the blood

There were 2 people who were trying to switch identities with each other. They switched birthdays and other relevant information, so on the paper lists they looked like the other. The were both building walls underground. The walls had their blood in it. There was something hidden in the blood by one of them.
There were also things hidden in the Christmas tree. Someone was taking the pinecones off for analysis.
There was some kind of rotting green root under the tree that I picked up that was gooey. I wanted to throw it out.

Also a dream about order and chaos.