The 10th Tuscolano is busy hunting down two girls in their twenties who, in the space of a few hours, uncovered, burgled a boutique and stole a spider. The two seem intent on having a memorable day, but the youngest is eight months pregnant. Meanwhile, Roberto tries to corner Maiorca who has destroyed the coded notebook, the main evidence in the trial against the Carranos. On the eve of the trial against Ruggero Carrano, in which Roberto should participate as the main witness for the murder of Milo Paulin, Carrano's machinations do everything to discredit the new commissioner. This is how Ardenzi ends up being investigated by the disciplinary team for the murder of one of their operatives, whom he threatened several times after the destruction of the coded notebook.