After moving with his daughter to a small picturesque town in western Norway, Asgeir learns that dark forces lurk and soon finds himself involved in something much bigger than just small-town crime.

Asgeir is forced to face the consequences of his actions, and more problems follow when a threat from his past reappears; Ragna must sign an agreement with Asgeir to protect her identity.

Ragna reveals how far she is willing to go to become part of the group and continue her mission; when Asgeir's identity is leaked, neither he nor his daughter are safe anymore.

A terrorist cell crosses the border into Germany and encounter a lack of security; Ragna and Ole must take refuge in the countryside, where Ragna discovers how influential her blog can be.

Ragna gets locked in an abandoned factory hall and with her secret identity threatened; when a leak inside the terrorist cell is revealed, Brehme is prepared to use all means to expose the infiltrator.

After arriving in Berlin, Ragna approaches Ole and learns more about the ideology behind the cell's plane, but just when she thinks she has control over the situation, her worst fears come true.

Ragna must track down Cato and stop the attack Ole warned her about. However, with time running out, she is forced to cross a border she thought she would never cross.

Ragna rushes to find Ole and stop the attack in time; Kathi finally takes the matter into her own hands, and goes straight to the source.