When the unthinkable happens, not everyone is ready. Not everyone knows what to do. Lacking any survival knowledge, she finds herself in the shelter of the city's Liberty Tunnels with a group of strangers, none of which know much more than she does. The odds are against them. Panic, hunger, and sickness are rampant. The tunnels increasingly become more dangerous. With limited skills, Abby must pull it together, not only get her and the girls out of the tunnel shelter, but to survive long enough to make it home one last time.