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When a woman is found in a cage brutally murdered, Karppi and Nurmi focus on learning everything they can about the victim — and her troubled son.

Fueled by desperation, Ossi makes a move. Karppi receives an intriguing call about her late husband. Nurmi has a brief — but painful — reunion.

Karppi's case takes a turn when human remains are found in the sewer. Nurmi visits Laura in the hospital. Henna faces heat from all sides.

While searching for a missing suspect, Karppi and Nurmi make another grisly discovery. A cryptic clue hints at the killer's motive.

Karppi and Nurmi investigate if a teen's overdose is connected to their case. Henna goes snooping. Karppi chases a lead in her husband's death.

Now on the run from the police, Karppi fights to continue her investigation. A terrified Henna finds herself in mortal danger.

An unexpected encounter leads to more clues about Karppi's husband. The detectives unravel a common thread among the victims.

Karppi and Nurmi track the suspect to the ruins of an old convent, where they discover that the case is anything but over.