Gracie Thompson has a job, a loving family, a twin brother who drives her insane and a great friend. A chance meeting introduces her to the love of her life. But the storm clouds are gathering, Europe is teetering on the verge of war and threatening to destroy everything Gracie holds dear. When war arrives her family are split up, her younger siblings evacuated, her brothers join up to serve, her boyfriend, Charlie, is in daily danger and her life is threatened.

1884 - When Betsan Morgan’s mother succumbs to a devastating illness, she doesn't think her life could get much worse. But then her father moves in his new beau, an unserious flitty woman and coincidentally also the bargirl in the pub he works in, and she soon learns her house is no longer a home. All she can do is sit in the attic and stare at the portrait of her mother. Her new stepmother, Elinor, couldn’t even let them have the grace of keeping it in the hallway.

Vienna, 1937. When beautiful American Kitty becomes engaged to Austrian diplomat Edgar, she finds herself thrown into a very different world in Europe, and soon longs for home. But when the woman designing her wedding dress, Judith, takes Kitty under her wing, she sees the city of Vienna in a new light–a city of culture and music that she can explore with her new friend.

Berlin, 1936. The Landau family are at the heart of their community, running a music shop in Berlin and just trying to survive. But their lives are unravelling as Hitler's power increases and the treatment of Jewish families deteriorates. Eldest daughter, Rachel, fears for her sisters' future and will do anything she can to keep them safe. Will she find hope in the darkness? Paris, 1936. As whispers of war travel over from Europe, American debutante Kay escapes her mother's grasp and travels as a reluctant spy from Paris to Berlin.

Liverpool, 1939. Bella Rogers thought her life was just starting; she can’t wait to get married to her childhood sweetheart, Bobby. But when war is declared and Bobby is called up, his letters stop, leaving Bella heartbroken and alone. Then her family is torn apart by tragedy when her angelic 5-year-old sister dies from a terrible illness. They can barely afford a funeral, but the church is packed with the entire community, devastated for their loss. Grieving for her sister and lost love, Bella finds a job at the Bryant and May factory, making matches.