Two worlds collide when an airplane goes down in the wilds of Alaska. Nora Kavendash, a retired software developer, finds herself taking care of a mysterious woman with amnesia who she soon nicknames 4B. Weather and rugged terrain work against them as they wait for rescue and Nora worries about a package she must deliver as a matter of life and death. When help finally arrives, it seems everything was somehow simpler when it was just the two of them against the unknown. Life sweeps in and threatens to break the tenuous tie the two women have forged, and 4B is faced with discovering who she really is. More importantly, they both learn that it's impossible to run from yourself.