One mother's impossible choice. One daughter's epic search. Occupied Norway, 1944. As the war rages on, Anni is surviving as best she can, contributing to the resistance whenever possible and standing firm without her sailor husband Lars, who she hasn't heard from in three years. Her daughter Ingrid is the bright spot in her life and Anni is determined to keep her safe and happy. When a German official is billeted at their house the situation for them both becomes far more dangerous, and Anni faces an impossible choice.

In the years since the war and since she moved to London to live with her father, young Ingrid has been trying to make sense of the disappearance of her mother just as peace in Norway was declared. Ingrid desperately holds onto the fact that Anni promised she would always come back for her. Undaunted, Ingrid sets out to discover what happened to her mother all those years ago...