In Egypt, Alice and Elsie are confronted by the heart-wrenching reality of love during wartime, and whilst enduring the horrific conditions on Lemnos, Olive faces her greatest test of faith and resolve.

After being seconded to a British hospital in France, the girls come face-to-face with the snobbery of the British nursing staff. Alice is forced to face the emotional brutality of war when she hears news about Harry.

Alice struggles to accept Harry's death; Hilda discovers an aptitude for anaesthetics; Olive gets a proposal and Elsie returns to the war as part of the Croix Rouge.