Surviving the brutality of a Nazi prison camp, Marta Nederman is lucky to have escaped with her life. Recovering from the horror, she meets Paul, an American soldier who gives her hope of a happier future. But their plans to meet in London are dashed when Paul's plane crashes. Devastated and pregnant, Marta marries Simon, a caring British diplomat, and glimpses the joy that home and family can bring. But her happiness is threatened when she learns of a Communist spy in British intelligence, and that the one person who can expose the traitor is connected to her past.