Buonvino and his team grill the Bioparco employees: each seems to be hiding a motive for this brutal crime. Just as the commissioner and Veronica decide to make their relationship official, cruel and cruel fate calls into question every professional and sentimental certainty.

Amidst sentimental doubts, Buonvino tackles a macabre case: a headless, naked corpse was found in the anaconda tank at the Bioparco. While the team struggles to identify the victim in an increasingly intricate mystery, Veronica makes an important decision, finally feeling ready to embrace a new love.

Buonvino and his team delve into the Nodaris' past to unravel the mystery of Aldo's disappearance. Thanks to his humanity, the commissioner motivates the agents and solves the case, bringing to light truths buried for years. The investigation's success reawakens feelings for Veronica, which had previously been dormant, but complicates his personal life.

Commissioner Buonvino arrives at Villa Borghese, where he's reunited with his former colleague Veronica Viganò as his deputy. Together, they tackle the case of Girolamo Nodari, found dead by the park's pond. What appears to be a suicide turns out to be a deeper mystery, tied to the disappearance of Nodari's son, Aldo, who vanished ten years earlier.