Dangerous munitions work links two very different women in WWI Britain. Ambitious Lizzie Fenwick puts a note in a box of ammunition shells which triggers an exciting wartime romance. In the face of increasing casualty figures, patriotic Eunice Wilson is overcome with regret for shunning her conscripted husband. Events soon mean Lizzie must make hard choices and accept that a less romantic future beckons. Meanwhile, Eunice attempts to cope with personal tragedy. Peace returns, but with it comes the discovery of a betrayal which sets the two women on a potential collision course where they must confront everything they thought they knew about love and loyalty. And let go of what they want to hold on to most.