While out playing, young Silja finds a severed arm; not wanting to get involved, her parents anonymously tip off the police; later that night, Silja mysteriously disappears.

In spite of warnings, Thomas begins investigating Silja's death, and discovers a seemingly abandoned sawmill that holds macabre secrets.

During arrest, a suspect is shot and killed by a member of the military; Thomas begins to wonder if the police force is under the authority of the military HQ and NATO staff.

Several clues point to Thomas' own family, but there are some who are determined to prevent him from revealing the truth and derail the investigation.

Thomas and Mia discover that the police and the armed forces are concealing a great scandal from the Cold War and decide to head to Russia to uncover the truth.

Mia and Thomas are chased on their way to Russia to find the infamous double agent.