Living in a dry, desolate wasteland, seventeen-year-old Delta returns from a trip to a neighboring village to discover her home settlement has been raided and her family abducted. Suspecting the man in charge of the attack, the General, is after a secret map tattooed on her back, Delta sets off into the wastes, where she discovers a ragtag group of wanderers that she isn't sure she can trust, but with whom she must travel if she is to find her family.