Mateo knows she isn't very important. How could she be in a universe of nine quintillion humans, all bustling about with their insignificant lives? Her life will be no exception. Unless she does something to make herself important, to make herself stand out in the largest crowd of crowds. And what could be more important than being the one to finish humanity's conquering of the universe, to work out the final piece of the puzzle, to discover The Last Secret of the Universe. She has a lot of work to do.