It's night, and the walls of Rachel's home creak as they settle into the cover of darkness. Fear has led her to a reclusive life on the land, her only occasional contact with her sister. A hammering on the door. There stands a mother, Hannah, with a sick baby. They are running for their lives from a mysterious death sweeping the Australian countryside. Now Rachel must face her worst fears: should she take up the fight to help these strangers survive in a society she has rejected for so long?