Carrie Tiptree thought her life was mapped out - marriage to her fiancé Jeffrey followed by the family she so craves. But as war escalates, she defies everyone's wishes and joins the ATS, leaving the sleepy hamlet of Nether Hutton for Southgate Lodge. Miles away in Leeds, newly orphaned Nan Morrissey can hardly wait to join the forces where she hopes she will be able to leave her troubled past behind. Awaiting the two new arrivals is Evie, newly wed and blissfully happy. Under the watchful eye of Sergeant James, the three women aid the war effort - and become as close as sisters, helping each other through the trials and tribulations of war. In a time of tragedy and great uncertainty, can Carrrie, Nan and Evie survive not ony the war but the call of their hearts?