Hitler wanted dead. To test their suspicions, SOE run a "blue dye" operation: Max is ordered to write down a piece of false intelligence at home, where Marianne can find it. If the information is picked up from intercepted German transmissions, Max must personally execute her, and if he is found to be an accomplice he will be hanged for high treason. He is told to otherwise act normally and not conduct his own investigation. Defiant, Max visits Guy Sangster, a former colleague who knew Marianne; however, Sangster, blinded in the war, cannot confirm her identity. He reveals that resistance fighter Paul Delamare, who worked with Marianne in France, is still alive in Dieppe and could identify her. Max finds a young pilot, Adam Hunter, gives him a photograph with a "classified" note—asking if the woman in the photo is Marianne Beauséjour—and instructs him to obtain a "yes" or "no" answer from Delamare. Max and Marianne host a house party. His commanding officer, Frank Heslop, comes and tells him that Hunter was killed while waiting on the ground for the answer from Delamare and berates him for his insubordination. Max wonders if what he was told about Marianne is a test of his loyalty as part of a promotion to V-Section. The next evening, Max takes the place of a Lysander pilot and flies to France to meet Delamare, who is being held at the local police station. Max and the local resistance break into the town's jail, but Delamare is drunk and unconvincingly verifies the picture. The delay gives the French police officer room to alert the Germans, whom Max and the resistance manage to defeat. Prior to leaving, Delamare tells Max that Marianne was a talented pianist who had once played La Marseillaise in defiance of the occupying Germans in the early stages of the war. Back in England, Max takes Marianne to a local pub and demands she play the piano. She cannot. She admits she is a spy and forwarded the "blue dye" message, which Max left in plain view. She insists her feelings for Max are genuine, and that she was forced back into being a spy because German agents were threatening Anna. Max, unwilling to kill her, tells her they must flee the country. He kills Marianne's German handlers, a nanny and a jeweller. They drive to a local airbase, but Max cannot get