Nina Kautsalo has returned to Ivalo, she is becoming the new police chief. When the local pharmacist is found murdered, Nina gets to investigate her last case with her old partner Aikio.
The secret of the murdered pharmacist leads Nina to investigate the international car testing in Ivalo. She encounters the American engineer Brendan she saved some years ago. Hamari is out of prison and stumbles upon the test car.
The police have two murder cases on their hands, both with apparent connections to car testing. Nina agrees to go with Brendan. Hamari's son Perttu is bullied at school and takes his mind off his problems with a secret building project.
The CEO of car manufacturer Pharada arrives in Ivalo to launch a new project, but the press conference gets a bizarre twist. Nina and Brendan grow closer. Perttu is bullied even more brutally.
Pharada security chief Walter continues their serious search of the tests car. Nina embarks on a reckless rescue attempt. Marita is about to collapse under her construction project. Perttu comes to a desperate conclusion.
Nina grapples with her own personal choice. Pharada gets ready for the launch event of their new car. When Nina finally discovers the secrets from the past, she has to race against the clock to stop a murder that has not yet taken place.
