The murder of a loan shark seems to be an open-and-shut case. But Sergeant Pietro Fenoglio suspects that there's more beneath the surface. And he's prepared to dig.

The loan shark Fraddosio’s murder seems to be resolved, but Fenoglio still has his doubts. Meanwhile, tensions escalate within Bari's mafia, and Vito Lopez is determined to protect himself.

Over the past six months, a crime war has erupted. Fenoglio and Pellecchia investigate the war’s origins when a shooting aimed at a mobster injures innocent victims. Serena has news.

A fundamental mafia rule seems to have been broken when a victim from Bari's criminal war is found. A desperate manhunt ensues. Pellecchia and D'Angelo confront personal pasts.

There's a major shock when Lopez takes unexpected action. The history between Lopez and Grimaldi comes to light, revealing how the mafia has developed in Bari.

National tragedies, including the Falcone murder in Sicily, cast a long shadow. The carabinieri have one recourse: to attempt to dismantle the mafia organisation. Lopez is the wild card.

Serena wants a break and plans to leave town for work reasons. Fenoglio must make a life-altering decision when he receives dangerous information about someone he trusts.

Fenoglio finally identifies the perpetrator of a haunting murder. And what he's discovered leaves him questioning everything.