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.

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.