Lifeline must work overtime when a heavy storm downs several British planes on their way back from a bombing raid on Berlin. Natalie comes into contact with Major Nicholas Bradley, a British officer on a special assignment, who is uncooperative and highly critical of Lifeline’s security when he follows her all the way back to the Candide. It seems that Bradley’s concern is well founded, as an undercover Gestapo man is also tailing Natalie.

Major Nick Bradley returns to Brussels to co-ordinate resistance activities whilst waiting for the Allies’ final push, and clashes with Monique over leadership of Lifeline. A tense time is in store for Lifeline when Alain is arrested, and Bradley decides to make a deal with a German officer to try to get him out of Gestapo headquarters. However, the officer demands one million francs in exchange for Alain’s freedom.

Bradley travels to the Ardennes to continue recruiting his own private army of former airmen to engage in sabotage activities – the target is V2 testing sites. Bradley’s first objective, however, is to hijack a convoy of weapons and he asks Monique for assistance in recruiting men and resources. Lifeline, previously an evasion network, is now a fully-fledged guerrilla operation

As Bradley’s army remains in hiding along the Dutch border, he and Natalie become closer as they work together planning the raid on the V2 site. To increase his chances of success, Bradley must try to obtain the rocket delivery schedule and plans to get the information by dining with Kessler at the Candide…. Meanwhile, Reinhardt is rapidly closing in on Lifeline, with Natalie as his chief suspect.

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.