Torre and Piccolo arrest Alfredo Brachetti, suspected in the murder of Flora Torrielli. He denies everything and presents an alibi, but the agents remain suspicious and look for connections with other characters.

Livietta is using a bit of blackmail on her parents to get them to buy her some low-waisted pants. But Camilla and Renzo have their own problems. Renzo has to go to dinner with Roberta's parents, and Camilla gets an urgent phone call from Anna.

Gaetano and Torre get called to the scene of another murder. Suspecting that the body is that of Quantunque, Gaetano calls Camilla, who has gone to Anna's restaurant to meet someone identifying himself as Quantunque. Anna turns out the lights at the restaurant and Gaetano turns on the siren of the squad car.

Inspector Berardi and Camilla discuss the case, but they lose track of time and it gets very late. Phone calls with their significant others ensue. Gaetano is concerned Camilla might end up in the middle of a third murder.

Renzo and Camilla have a heated argument after a work dinner that went badly, bringing to the surface tensions and jealousies that put their relationship to the test. Meanwhile, at school, amid subtle romantic hints between colleagues, attention turns to the upcoming assembly.

During the school assembly, the principal surprises the students by revealing his rebellious past and ultimately decides to withdraw the controversial circular. Meanwhile, Anna faces a delicate moment in her life and receives an unexpected dinner invitation.