In December 1941, Charlotte Donahue is engaged to Nick Adler, a handsome, pre-law student at Georgetown University. Despite her studies at a liberal arts college, she expects nothing more than to marry her fiancé and settle into a conventional life as a young American homemaker. But her future is unexpectedly disrupted after the Japanese attack on Pearl Harbor. While Nick trains for the battlefront with the U.S. Army, Charlotte does her part by volunteering as a nurses' aide with the American Red Cross.

Assigned to a convalescent ward at Walter Reed's Army Medical Center, Charlotte discovers her passion lies, not in the home, but in tending to the wounds of injured soldiers, all of whom remind her of Nick. Here she is drawn to a mysterious soldier, Lieutenant William Kendrick, whose jet was shot down in the skies over Germany. As Will's physical and psychological wounds begin to heal, he and Charlotte will develop a friendship that will bind them together in ways they never imagined.

Battle Hymns is a poignant story of love, survival, and redemption set against the backdrop of the Second World War.