1945: Along with hundreds of other war brides, Betty, Madeline, Alice, and June set sail for New York to be with the men they love. In the days they spend at sea, the four young women become firm friends and vow to stay in touch no matter what their new lives bring. Life in a new country comes with many challenges, but Betty, Madeline, Alice, and June didn't move half way across the world to give up without a fight.

When journalist Ella Franks is unmasked as a woman writing under a male pseudonym, she loses her job. But having risked everything to write, she refuses to be silenced and leaps at the chance to become a correspondent in war-torn France. Already entrenched in the thoroughly male arena of war reporting is feisty American photojournalist Danni Bradford. Together with her best friend and partner, Andy, she is determined to cover the events unfolding in Normandy. And to discover the whereabouts of Andy’s sister, who has followed a lover into the French Resistance.

When Grace, April, and Poppy join the US Army Nurse Corps, they see it as little more than an adventure, one made all the better by their first station: Pearl Harbor, Hawaii. Joined at the hip, idealistic Grace, exuberant Poppy, and brave but haunted April frolic in the sun, attending parties, flirting with the handsome soldiers, and becoming fast friends with seasoned nurse Eva. Like the Hawaiian sun, their future seems warm and bright - until the infamous morning of December 7.

Occupied France, 1940. When the staff at a field hospital draw straws to find out who will join the evacuation from Dunkirk, Nurse Cate is left behind. But when the Nazis arrive to claim prisoners of war, she takes her chance and flees into the night, taking one patient with her. Fifty miles away, the surrendering soldiers of the Royal Norfolk Regiment are shot dead by the advancing Germans. Beneath the pile of bodies two men survive, crawling to the safety of a nearby farmhouse, where sisters Elise and Adelaide risk their lives to take them in.

London, 1941. The Blitz. When a Royal Navy memo arrives at head office, requesting female recruits to sign up as motorcycle dispatch riders, delivering highly classified orders across the country, three women jump at the chance to sign up for the most dangerous jobs in London.