Some months have passed, and Albert and Monique are preparing for the grand opening of the Restaurant Candide on Brussels’ Grand Place, financed by London to allow Lifeline to continue its activities. Lifeline also recruits a new forger, Max Brocard. Alain brings a British agent to the Candide with an urgent request from London: a Brigadier General with information on a major Allied offensive in North Africa (named in the programme as Operation Torch) has been shot down on his way to a top secret meeting and must be rescued at all odds. Natalie has already discovered the Brigadier and prepares to take him down the line. However, disaster strikes when a German soldier is murdered, and in retaliation, Kessler orders that twenty people are to be held hostage and shot if the killer doesn’t give himself up. The Brigadier is one of the hostages.

Dr. Keldermans visits the Candide with tragic news, and Albert must take decisive action if Lifeline is to continue. Meanwhile, Natalie has the difficult task of taking two eccentric Russian evaders down the line. Brandt dines with a high-ranking military acquaintance, Oberst von Elmendorff, who tries to recruit him in a military plot to assassinate Hitler, while Kessler invites Albert to a strange garden party.

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.

Whilst dining at the Candide, Kessler becomes intrigued by Madeleine Duclos, an elegant but remote socialite. Meanwhile, Monique takes some airmen down the line and is shot and wounded when she becomes unintentionally involved in a smuggler’s attempt to evade a railway checkpoint. Recovering in a convent hospital, she is cleared of smuggling, but finds herself in more danger when the French police discover the train tickets she was carrying for the airmen and that her papers are false. Kessler sets out from Brussels to interrogate her, prompting Natalie, Alain and Max to stage a daring rescue mission.

Natalie’s new boyfriend, Francois, is keen to become involved in Lifeline, but Albert has doubts. Paul Vercors, the fanatical leader of a Communist cell in Brussels, wants to take over Lifeline, and tries to enlist the assistance of a colleague – Max. Meanwhile, the Communists continue their resistance activities and plant explosives on a railway line to derail a train. Unfortunately, the train’s passengers include Natalie and Francois, escorting evaders down the line.