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.