Jackdaws is a World War II spy thriller written by British novelist Ken Follett.

[4][5] A week or so before D-Day, a group of French resistance fighters tries to take out a critical telephone exchange in Sainte-Cécile.

Dieter Franck is a German Army officer working for Field Marshall Erwin Rommel.

Rommel is on the coast, preparing for an invasion attempt by the Allies, and sent Dieter into France to gauge the strength of the French resistance.

Dieter, an expert interrogator, witnessed the attack, seeing trained, brave fighters with plenty of weapons.

Under interrogation, he forces one of the captured prisoners to tell him about Michel and Mademoiselle Lemas, who is the contact for Allied agents entering France.

Flick senses something wrong at their original drop site, so she and her team parachute into France at an alternate location.

Flick and her team (minus Ruby, who was captured) manage to destroy the telephone exchange, but Greta is killed in the explosion.