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.

While Malik juggles his secret assignment and a homicide at a jewelry store, Alba realizes she can't hide her true feelings from Riccardo any longer.

An unsettling discovery stokes tensions between Alba and her father. A woman receives a graphic video on her phone showing her husband being murdered.

Carlo defies Carta's orders while investigating the death of an heir to a pasta empire. Meanwhile, Malik debates whether to hand over the bullets.

Desperate to help her dad, Alba reaches out to Riccardo. Cantabella finds himself in hot water after subduing a paranoid man wielding a broken bottle.

As the team races to connect the dots between all the players in the Bosca case, a new crisis forces Carlo and Malik to work together once more.

Carlo and Malik race to recover a human heart that was to be transplanted into a teen patient, but stolen en route to the hospital for ransom.

Carlo and Malik investigate the death of a man who had gotten himself beaten up to cheat on his insurance in order to help his family.

As Carlo's team grieves and investigates the shocking death of one of their own, suspicion falls on a fellow co-worker.

The police investigate the death of a homeless woman who, despite having run away from home years before, had held onto a memento of her daughter.

When the bloodied clothes of a missing teen boy are found laid out in his school's courtyard, the police are called in to investigate.

When a hoarder is found murdered in his home, Malik must work with the psychologist who'd been monitoring the victim's disorder to solve the case.

The murder of a social worker casts suspicion on her former partner, who used to beat her and was at her home the night of the murder.

When a personal trainer at a country club is found poisoned, the police discover he'd been juggling several paid sexual relationships with clients.

While investigating the death of an architecture student, Malik makes a promise to a child that he can't keep, which brings unexpected consequences.

When the body of a young man is found at a dumpsite, the police discover the victim was involved in illegal boxing matches to support a baby on the way.

Days after a young man inquires about his friend's cause of death; he too is found dead. Carlo's team learn the motive behind their co-workers' murders.

As the police uncover the truth behind the recent murders of their two co-workers, Marta and Muzo must come to terms with past choices they made.