Twenty-year-old Netta can't wait to leave Germany and teach in Brighton, England. It's the height of the swinging 60s, but Netta hasn't bargained for the prejudice she'll receive in a country full of anti-German sentiment just twenty years after the war. She finds solace in Billy, the school caretaker, with whom she falls in love. But when she takes him back to Germany at Christmas it's Billy's turn to be on the receiving end of a frosty welcome.

It's 1949 when Netta's father Max is released from a Siberian POW camp and returns to his home in occupied Germany. But he is not the man the little girl is expecting – the brave, handsome doctor her mother Erika told her stories of. Erika too struggles to reconcile this withdrawn, volatile figure with the husband she knew and loved before, and, as she strives to break through the wall Max has built around himself, Netta is both frightened and jealous of this interloper in the previously cosy household she shared with her mother and doting grandparents. Now, if family life isn't tough enough, it is about to get even tougher, when a murder sparks a police investigation, which begins to unearth dark secrets they all hoped had been forgotten.