Pulling herself from the rubble, Jo's first priority must be her patients... but she can't stop herself frantically searching for Moira. When Jo eventually finds her, buried beneath a foot of bricks and stone, Moira is barely clinging to life. Jo makes a solemn vow: she will do whatever it takes to help the allies win the war, even if it means sacrificing her own safety.
The opportunity to make good on her promise comes sooner than she expects - nurses are badly needed to evacuate wounded allies across enemy lines. It will be dangerous, heartbreaking work and her life will be at risk every moment, but Jo knows that the moment has come to prove herself at last...