September 1896: An aspiring archaeologist, Smith College graduate Betsy Hayes travels to Athens, desperate to break into the male-dominated field of excavation. During the heat and dust of Greece, she finds an unlikely ally in Charles, Baron de Robecourt, one of the few men who take her academic passion seriously. But when a simmering conflict between Greece and Turkey erupts into open warfare, Betsy throws herself into the conflict as a nurse, not knowing that the decision will change her life forever and cause a deep and painful rift with her oldest friend, Ava. June 1898: Betsy has sworn off war nursing but when she gets the word that her estranged friend Ava is headed to Cuba with Clara Barton and the Red Cross to patch up the wounded in the Spanish-American War, Betsy determines to stop her the only way she knows how: by joining in her place. Battling heat, disease, and her demons, Betsy follows Teddy Roosevelt's Rough Riders straight to the heart of the fighting, where she is forced to confront her greatest fears to save both old friends and new.