For the thousand years that Luna was banished, someone had to take care of her job of going through peoples dreams. Dream Walker was that someone. He was conscripted into it by Celestia, as a royal spy. The perks were nice, a room in the castle, high pay, and immortality. Now Luna is back and Celestia is planning on getting rid of him. He knows too much about her and the plans she has laid out. Dream Walker must be killed.