Zoe Johnson spent most of her life living in the shadows, never drawing attention to herself, never investing in people or places. But when a wide-eyed, bedraggled teenager with no memory walks into the diner where Zoe works, everything changes. Now, against her better judgment, Zoe, who has been trying to outrun her own painful memories of the past, finds herself attempting to help a girl who doesn't seem to have any past at all. The girl knows only one thing: she must reach a woman in Corpus Christi, Texas, hundreds of miles away, before the government agents who are searching for her catch up to them.