66th North Precinct

Working as police officers in Rovaniemi, Maria and her colleague Samu are mostly used to dealing with petty crimes. But when a man is found shot dead in the middle of nowhere, their work becomes more difficult. Maria has just decided to give up her boxing career, but suddenly her brother shows up and asks her to go to a fight to solve an urgent family problem.

A fire breaks out during a concert. What first appears to be an isolated incident turns out to be a pattern and the perpetrator seems to be following the artist Amanda on her tour around Finland. Meanwhile, Niko has, as usual, over-promised. But just when he thinks the battle is lost, Maria decides to resume her boxing career. But she doesn't dare reveal anything about it to Essi.

A number of rapes are reported in the district, with the perpetrator entering the victims' homes. But there are no signs of intrusion, and the police begin to question the testimonies. By chance, Maria discovers how the mysterious offender seems to be able to walk through locked doors. The atmosphere at Maria's house is frosty. Maria continues to keep the training secret, but Essi suspects that something is going on.