The year is 1942 and World War II is in full swing. Odette Sansom decides to follow in her war hero father's footsteps by becoming an SOE agent to aid Britain and her beloved homeland, France. She leaves behind her children, her friends, and her life. After five failed landing attempts- including a plane crash- she finally arrives in occupied France to begin her mission. It is here that she meets her commanding officer, Captain Peter Churchill. As they complete mission after mission, their forged bond of trust gives way to love. All the while, they are hunted by Germany's top spy-catcher, the cunning and relentless Hugo Bleicher. Bleicher finally succeeds in capturing them and they are sent to Paris's Fresnes Prison, and then to concentration camps. In captivity, Peter and Odette are starved, beaten, and tortured, but never give up the whereabouts of their colleagues, their hope, or their love for each other.