When Peggy Becker married Englishman Tommy Morehouse in San Antonio in the spring of 1938, her cousin and best friend Venetia "Vennie" Stoneman was her bridesmaid. After the wedding, Peg and Tommy traveled across the Pacific to Malaya, where Tommy managed his family's rubber plantation. There they expected to raise a family and live a comfortable and rewarding life among the British expatriates in the tropics, while Vennie returned to Galveston to continue training as a nurse.

The start of the Second World War changed those comfortable, settled lives: Tommy Morehouse became a prisoner of war in Malaya while, Peg barely escaped the fall of Singapore with her small son. Vennie Stoneman Became a nurse in the US Army Nurse Corps, tending to battlefield casualties in North Africa, Italy, and France. Meanwhile in Australia, Peg waits out the war, wondering if her husband will survive brutal captivity by the Japanese, and Vennie risks her own life as an air evacuation nurse. Throughout all, the two women write to each other, of their lives, loves, of Vennie's patients and comrades, and Peg's children and the woes of running a wartime household among rationing and shortages of shoes for her children.