Eyewitness

Two young kids, Henning and Philip are attracted to each other. One night, when they exchange their first kiss, the two boys witness a bloody execution. Narrowly escaping the murderer who just killed four people, they flee with the murder weapon and threw it in the lake. The investigation falls to the adoptive mother of Philip, Helen, a former officer of the Criminal Brigade.

In Oslo, a bomb devastated a restaurant run by Hamit Milonkovic, a gang member of the Z. Her daughter Zana, locked up by him in the building during the explosion, managed to escape. Via Internet chat, the girl comes into contact with the killer of the sandpit. In the forest, Henning realizes that the murder weapon is visible at the bottom of the water hole where he threw it.

Someone tries to kill a motorcycle gang member near a school. A girl is killed. Crushed by the weight of secrecy, Henning does not sleep and becomes violent. Philip confesses to his mom what he had seen. In the criminal brigade, Helen and his team welcome a new chief of investigation a rather intriguing man.