But when she crosses paths with Walker and Tara something inside her awakens. Something she thought had died along with her entire family. In these new friends Eva sees a promise of what the future could be, as well as evidence that humanity might not be extinct after all. When a ghost from Eva's past makes an unexpected appearance, the group sets out on a cross-country trek that will teach Eva how to love and hope again, and will remind her what it truly means to be human.