After finding a frozen body during a drug-related chase at an outdoor market, Inspector Carlo Guerrieri fixates on finding a man he saw at the scene.

A breakthrough in the case leads Carlo and Malik to a community of immigrants living in an old factory. Malik goes on a risky mission alone.

As the team investigates the murder of a young woman found inside a piece of luggage at the airport, Carlo contends with buried secrets from his past.

The hunt for a killer who stabbed a nun inside a sex shop takes a perilous turn. Back at the station, the team meets Santagata's successor.

One mystery leads to another when DNA from the body of a recently murdered woman is traced to a man who's been dead for months. Guilt weighs on Alba.

After Alba finds a young man's body in a banged-up car, Carlo spots a familiar name among the victim's belongings. Malik reconsiders Carta's request.

A case involving a young female rapper strikes a nerve for Repola and forces Muzo to work alongside his estranged wife. Alba's boss offers her advice.