Somehow, being selected the first girl warrior changes everything about Tia's planned, perfect life in her phalanx.
The world is different now. In Tia's world, there are communities called phalanxes. Each are strong, independent, and completely productive. Everyone looks and dresses the same- there is no conflict anymore. There are exactly 2500 people in each phalanx, and five phalanxes in Tia's area. There is no need for any disruption from her perfect world.
That is, until she gets to be selected as a warrior- the first girl warrior,ever. As her life starts to unravel around her, she quickly finds out that not everything is as calm and peaceful as it once seemed.