Kari Sorjonen, a detective yearning for a less complicated existence, relocates with his family to a tranquil town nestled on the shores of a lake. The peace is short-lived; he finds himself instantly drawn into a murder investigation.

As Sorjonen and his team examine the fresh crime scene, Katia’s mother seeks out clues within the resort. Meanwhile, a reporter embarks on an investigation into Sorjonen's history.

Lena discovered a vital clue pointing towards the kidnapper's identity. For Johanna, long-held secrets began to unravel. Meanwhile, Degerman made contact with Paulina.

While Sorjonen examines the unsettling death of a narcotics officer, Janina finds herself increasingly entangled with a group of teenagers orchestrating a grand, drug-fueled celebration.

A second death, seemingly connected to the medication, compels Sorjonen to journey to St. Petersburg, accompanied by a fresh face on his team. There, at the gathering, a disquieting tableau emerges.

Following a lead from Europol regarding a dogfighting operation, the team launched an investigation. Meanwhile, Hannu-Pekka sought out Kari's assistance after a meeting with an escort took a disturbing turn.

Lena infiltrated a fight club, the assignment placing a considerable strain on her relationship with Katia. Meanwhile, a colleague inadvertently divulged unsettling details about their target to Sorjonen.

The discovery of a woman alive within a fish trap at the lake's depths casts a disquieting shadow over the team's efforts. Meanwhile, a politician seeks a favor from Taina.

At the site of the fatal collision, Sorjonen begins to piece together the connections between Elina and the missing vehicle. Meanwhile, Pauliina presses forward with her clandestine scheme.

Janina Sorjonen’s carefully constructed existence fractures when she awakens to find herself covered in blood, thrust into the heart of a brutal murder investigation.

Driven by a fierce need to exonerate Janina, Sorjonen urgently assembles disparate clues from various crime scenes, striving to anticipate the killer's next move.