In 1915, two spirited Australian sisters join the war effort as nurses, escaping the confines of their father's dairy farm and carrying a guilty secret with them. Used to tending the sick as they are, nothing could have prepared them for what they confront, first in the Dardanelles, then on the Western Front. Yet they find courage in the face of extreme danger and become the friends they never were before. And eventually they meet the kind of men worth giving up their precious independence for - if only they all survive.