Lifeline’s original function is now over – the Allied advance has severed the evasion lines and it is now a matter of keeping evaders safely hidden until the war is over. Despite Kessler’s irritation at Reinhardt’s manner and methods, his efforts pay dividends when he discovers a Lifeline safehouse. Two of his new prisoners commit suicide rather than talk, but Reinhardt is determined that the third prisoner will give information under torture. Albert and Monique receive a tip-off that the middle-aged Chantal sisters, who are based in Senlis and often shelter airmen for Lifeline, are in imminent danger.

An assassination attempt has been made on Hitler, and Kessler believes that Reinhardt is involved in the conspiracy. He begins to gather information that he hopes will provide his colleague’s guilt. Meanwhile, Albert becomes aware that the Communists are once more out to get Lifeline, and that he is their target.

Still languishing in prison, Albert learns that he was set up by the Communist leader Paul Vercors. Meanwhile, Dr. Keldermans makes a shocking discovery when examining an evader at a safehouse – the man is dying of bubonic plague. Lifeline’s personnel face the horrifying possibility of being wiped out by the deadly disease.

The Allied advance continues as they at last enter Belgium, and the Germans begin to plan a strategic withdrawal from Brussels. Albert is petitioning for his release from prison, while Bradley endeavours to forge links with other resistance groups. The people of Brussels are now left to their own devices, and recriminations are brewing for collaborators and black marketeers. Kessler comes to help Madeleine, while Alain offers Monique and Natalie a place to hide. Meanwhile, Reinhardt at last obtains proof that the Candide is Lifeline’s base of operations, and prepares to strike.