A young man who disappeared during a Christmas party is the subject of a case for criminal inspector Antti Hautalehto at the police in Borgå. His boss's alcohol problem increases his work pressure.

Hautalehto investigates the strange drownings of a soccer team. An eyewitness flees for his life and Hautalehto's wife wants a divorce.

A new murder makes Hautalehto focus on the investigation; suspicions about a serial killer arise; Hautalehdo's love life takes a new turn.

The theory of a serial killer is confirmed by the statistics, but suspicions about them cause confusion in the investigation.

The police receive new information about drownings; the undertaker receives unexpected guests at the Christmas table and the Christmas dinner is fatally interrupted.

The Central Criminal Police is investigating the cases, and Hautalehto and the entire police force in Borgå are suspected of protecting their own.

The media and the top management of the police demand results; Hautalehto secretly follows a different line of investigation; Hautalehto's budding love suffers from work obligations.

KRP and Hautalehto join forces to get to the bottom of what happened. Hautalehto underestimates the power of the killer's mad thirst for revenge and puts the innocent man in mortal danger.

An unethical psychiatrist is found in a hot tub. And he’s been there for three days. Details about the death make the police suspicious. Meanwhile, art forger Suvi Vettenranta is released from prison.

The police find a dummy of Hautalehto in a grave. Who's threatening him? Newly released Suvi seems to be under the spell of the strange art cult leader, the Master.

Jaako from the art community has disappeared. Ugly secrets about the Master are exposed. Berglund is ambushed in a press conference and comes under pressure to retire.

Hautalehto tracks the kidnapped Suvi. Suvi shows Hautalehto threatening messages from her estranged husband Olli. Jonna and Tero obtain security footage that implicates the Master.

Leena finds evidence of another woman in Hautalehto’s life, and doesn’t believe him when he denies being unfaithful. The team suspect that Hautalehto has a risky blind spot. The Master gets a shock.

Tarmo and Berglund team up and find vital information, which they show Hautalehto. The murderer has taken hostages for a specific reason; can Hautalehto find them in time to prevent more killing?