During World War I, a young nurse in a hospital in German-occupied Belgium is secretly feeding military information to the British. Complicating matters is the guilt she feels when she has to treat the German casualties inflicted as a result of the information she's passed on, and the fact that the local German commandant is falling in love with her.

During World War I, Captain's wife Dorothy Glenister finds it hard being separated from her husband, so she travels to France to the village where he's stationed. Dorothy disguises herself as the daughter of a local, which leads to complications when she's suspected of being a German spy.

Charles, Joseph and Sir Benjamin are in love with Maria and Lady Sneerwell is in love with Charles.