The Roba precinct is busy with cross-border crime and desperate bank robbers. Taru is trying to find a connection to her daughter while she leads her forces at work, where the pressure for budget cuts and better results is mounting. Arto cannot let go of his obsession with Puustinen and collides head-on with Taru, also endangering the permanent position promised to Pekka.

Taru fears for her job when a raid to a bordello, prepared in cooperation with the NBI, goes awry. An explosion is not far with the staff disobeying Taru's orders. Jani is single again, and jealous for Maikki. He's trying to find out whether Maikki is seeing someone. Jani is also pondering whether it's high time to approach his brother, with whom he hasn't spoken in years.

Arto is on tenterhooks after finding out a secret about Puustinen. The secret may endanger the future of Roba precinct and, at worst, even Arto's life. Jani identifies with the sympathetic veteran officer. Taru makes Maikki an unexpected job offer, and Maikki has to decide whether she's ready or even willing to take the job.

Arto tries to protect his family, but instead, finds himself chasing a dangerous escaped convict. The glitches in the police database cause everyone gray hairs. Maikki learns she has a rival for the new job. Elina is about to lose it, as once again a NBI guy screws up an investigation lead by the Roba precinct.

Taru starts a manhunt to catch the traitor. The noose tightens and the concern for the news spreading is growing bigger. Niilo feels like the scapegoat of the precinct, but he has his moments. Maikki is riding her last patrol, and Jani is not sure whether he should celebrate or mourn it.

Maikki's first day in her new job coincides with the day the Roba crew is under more pressure than ever to catch a suspect. Jani rides with a surprising partner, and the whole shift is about to turn into a farce when they chase a psychotic patient on the loose. In the evening, the crew parties under unusual circumstances and the guest of honor throws caution to the wind.