Fujiko begins work as a teacher at an all-girls school, where she immediately finds herself the target of affection for many of the students, including a shy girl named Isolde Brach. Fujiko starts to take an interest in Isolde and the two spend some time together. As Isolde is punished by her jealous classmates, she turns to Fujiko for a night of passion. However, it is soon revealed that Isolde is actually Zenigata's assistant, Oscar, who took the real Isolde's place in order to catch both Fujiko and Lupin. The next day, Oscar initiates a plan to capture Lupin. However by that time, he had already freed Fujiko, who tricks Oscar into giving her the code for a pendant containing a thesis by Isolde's late father. As Fujiko and Lupin escape and share the spoils, Oscar swears to get revenge on Fujiko. 
As Lupin attempts to woo Fujiko, she tells him about a jewel peacock at the bottom of a pyramid in Egypt. Meanwhile, Jigen, who is short on cash after being scammed, goes on a search for the peacock as well. Jigen soon finds himself fighting against not only Lupin, but the various traps set up by looters. After both Lupin and Jigen fall into a trap together, Fujiko appears revealing the peacock will appear if one of them dies in the trap. However, they both manage to escape by sacrificing some scorpions. The peacock reveals itself, but Fujiko is forced to give it up in order to escape from the pyramid.