Lars and Simon are looking for a medallion which, with the help of four stone tablets, will lead them to a treasure, the legendary Odin's Gold. They do indeed find the medallion. But they also discover a corpse, which has disappeared again when they inform the counselors at their sports camp.

A second stone tablet has been reported stolen. In addition, Henrik, a classmate, has disappeared without a trace. The trio tries to solve both cases.

Nora's brother Robin is suspected of stealing a weapon that a soldier threw away during an exercise. The trio also find the third stone tablet.

Thefts are piling up in an electrical store. The owner suspects asylum seekers of being responsible. Lars and his friends disagree.

The stone tablets that the trio has found so far have been stolen. They soon find out that Tom and Julia are behind it.

Nora is said to have sent threatening text messages to a classmate in order to get a part in a play. The friends try to find out who really did it.

When Simon spies on Sascha and manages to steal the stone tablets, he becomes the prime suspect for breaking the windows of the asylum seekers' home.

Strange incidents occur during a boxing tournament. Boxers repeatedly collapse with stomach pains and dizziness. The three friends investigate.

When the three friends break into the church to get the missing piece of map, they notice graffiti on the walls. The coolection basket has also been stolen several times. The three become the focus of the investigation. But Nora finds out that the pastor is not as “holy” as the village believes and beats his son.

Now that the map has finally been decoded, Nora and Simen set off in search of the treasure. But Sascha, Tom and Julie also follow the three friends on their search. It comes to a showdown in the mountains.

Lars witnesses a massive hacker attack. The hacker Ramrun blackmails the Norwegian government for a huge sum of money. As proof of her abilities, the hacker quickly shuts down all power lines. Lars' father is the security officer for the so-called “cyber gold” and is immediately dismissed. But all clues point to him as the perpetrator.

Nora and some of her friends were secretly filmed in the shower. The friends investigate. Meanwhile, Lars investigates Ramrun, but the hacker directs suspicion toward him and a hacker friend named Mitnik. Lars' father then closes the trio's base camp.

Havin, a classmate of the trio, disappears from the asylum seekers' home. At the same time, there is a spate of burglaries in Skjåk. The friends search for their classmate and try to find out who is behind the burglaries. At the same time, Lars meets Mitnik, a girl from Germany. The two continue their investigation, but are betrayed by Officer Roger Haugen of the Cyber Defense Department, who is working with the blackmailer. They try to get access to Lars' father's secret “CX” computer.

The trio investigates an “haunted house” belonging to an elderly lady. Someone is trying to scare the old woman out of her apartment. In the meantime, they also hide the “CX” secret computer. Unfortunately, they hide it in an old sofa that is being taken away to the garbage compactor.

Simon manages to save the computer, but he falls into Ramrun's hands. The friends try to locate her hiding place.

The trio investigates a case of damaged cars, in which Nora's brother Robin comes under suspicion because he was playing nearby. The children also manage to recover the secret “CX” computer and reveal Ramrun's identity.

A girl is attacked and the video is posted online as “happy slapping.” The trio tries to find out who is behind the attack. Meanwhile, Ramrun plans to kidnap Lars' girlfriend Emma and her family.

Simon's mother is diagnosed with cancer. Meanwhile, his father takes him on a hunting trip to distract him a little. But a shot is fired and another hunter is injured.

Ramrun received the “CX” secret computer in exchange for Emma and copied it. She then hides the computer at Lars's place to divert suspicion onto him. However, Lars manages to escape from the police and now tries to stop Ramrun by getting his hands on the cyber gold reserves first.

It comes to a showdown at the dam, where the Cyber Gold data is hidden. The trio manages to stop Ramrun and their accomplices and arrest them.