The daughter of a distinguished soldier, Bess Crawford follows in his footsteps and signs up to go overseas as a nurse during the Great War, helping to deal with the many wounded. There, serving on a hospital ship, she makes a promise to a dying young lieutenant to take a message to his brother, Jonathan Graham: "Tell Jonathan that I lied. I did it for Mother's sake. But it has to be set right." Later, when her ship is sunk by a mine and she's sidelined by a broken arm, Bess returns home to England, determined to fulfill her promise.
