The Spider and the Fly (1949) Plot Summary Explained

Maubert needs a skilled safe-cracker to break into the German embassy in neutral Bern and steal the list of Kaiser’s agents. Since Ledocq is the best in his field and the Minister of War specifically requests help locating German spies, Maubert argues there is only one man for the job. He uses the promise of a full pardon and the chance to see Madeleine as incentives to secure Ledocq’s cooperation.

Foreshadowing: Earlier in the film, Maubert admits to Ledocq that Madeleine has “got under his skin,” hinting at his willingness to bring Ledocq back into his life to maintain any connection to her.

• maubert
• ledocq
• bern
• spy mission
• recruit
• safe-cracker

The film reveals Madeleine’s name on the stolen list as a shocking twist, indicating she has been working as a German agent. This explains why she was always able to move between criminal and police circles without consequences. Her arrest follows immediately, with the implication she will be executed for treason.

Foreshadowing: The timeline hints at Madeleine’s mysterious freedom after criminal activities, suggesting protected status beyond her role as a love interest.

• madeleine
• german spy
• treason
• arrest
• list
• kaiser agents

After the failed robbery where Jean Louis is killed, Maubert suspects Madeleine provided a false alibi for Ledocq. Although he cannot prove it in court, he knows she lied to protect a criminal he has spent years pursuing. This betrayal of his professional duty ends their romantic relationship, though his personal feelings clearly remain complicated.

Foreshadowing: Maubert’s earlier warning to Madeleine to stay away from Ledocq establishes his awareness of the competing loyalties in his life.

• maubert
• madeleine
• break up
• alibi
• lie
• professional duty

Ledocq agrees to the dangerous mission primarily for two reasons: the promise of a full pardon for his crimes, and the prospect of seeing Madeleine again. Maubert dangles both incentives knowing Ledocq’s feelings for her remain strong despite his earlier claim that seeing her would be too dangerous.

Foreshadowing: Ledocq’s earlier statement that “they would tire of each other” contradicts his willingness to risk everything for her, showing his true feelings.

• ledocq
• mission
• pardon
• madeleine
• agree
• verdun

Maubert manipulates Alfred Louis, the brother of Ledocq’s deceased accomplice Jean Louis, by telling him that Ledocq did not give his mother a fair share of the loot from their crimes. This lie prompts Alfred to cooperate with police, providing the evidence needed to finally arrest Ledocq just as World War I begins.

Foreshadowing: Jean Louis’ death during the failed robbery gives Maubert the leverage to target his vulnerable brother Alfred.

• alfred louis
• maubert
• betrayal
• ledocq
• brother
• jean louis

When Ledocq visits Madeleine after the failed robbery, he claims it is too dangerous for them to be seen together and suggests they would tire of each other anyway. However, his later willingness to risk everything to see her during the war reveals this was a protective lie rather than his true feelings.

Foreshadowing: Maubert’s observation that Madeleine is different from Ledocq’s other women planted doubt about his emotional detachment.

• ledocq
• madeleine
• danger
• avoid
• feelings

The French government needs Ledocq’s unique safe-cracking skills to infiltrate the German embassy in Bern and retrieve the list of Kaiser’s secret agents. With the Minister of War authorizing the operation, Maubert is empowered to offer a pardon in exchange for Ledocq’s services, effectively freeing him to become an intelligence operative.

Foreshadowing: Ledocq’s imprisonment coincides precisely with WWI’s outbreak, making his specialized skills suddenly valuable to the war effort.

• ledocq
• prison
• release
• war
• government
• pardon
• bern

After the successful theft from the German embassy, Ledocq heads to Madeleine’s flat expecting to find her. Instead, Maubert is already there waiting, having discovered the truth about her betrayal. The scene serves as both a professional debriefing and a personal confrontation, as Maubert confronts the woman he loved about her treason.

Foreshadowing: Maubert’s lingering feelings for Madeleine despite ending their relationship suggest he would seek her out once the mission concluded.

• maubert
• madeleine
• flat
• confrontation
• return

With the spy mission complete and Madeleine arrested for treason, Ledocq loses his bargaining chip. Rather than being rewarded, he is folded into the French army as an anonymous soldier. Maubert watches him board a train heading to Verdun, where the brutal fighting means Ledocq has almost no chance of survival, a grim fate for both the criminal and the man who pursued him.

Foreshadowing: The film’s opening establishes Ledocq as a man who constantly evades capture, making his inevitable destination at the front a poetic form of capture.

• ledocq
• verdun
• front
• war
• soldier
• death

Throughout the film, Maubert acknowledges Ledocq’s skill and cleverness, even telling him directly that Madeleine is different from his other women because she has “got under his skin.” This respect makes Maubert’s pursuit more complex, he wants to catch Ledocq not just for justice, but to prove his own superiority as a detective.

Foreshadowing: Maubert’s early admission of admiration sets up their cat-and-mouse dynamic as a personal rivalry, not just professional duty.

• maubert
• ledocq
• admiration
• respect
• pursuit
• rival

Maubert orchestrates Alfred Louis’s betrayal by falsely claiming Ledocq shortchanged his mother from the robbery profits. Alfred, believing this grievance, provides information that allows police to finally arrest Ledocq. The timing is deliberate, Maubert waits until he has a solid case, and the arrest coincides with the outbreak of World War I.

Foreshadowing: The death of Jean Louis earlier created the family rift Maubert exploits, showing how one death leads directly to Ledocq’s capture.

• ledocq
• imprisonment
• alfred
• betrayal
• arrest
• world war i