Pål Johannessen was a Norwegian actor known for his role as Basse in the Norwegian «Olsenbanden» films.
Egon Olsen is commissioned to help a baron with an insurance fraud. As the dividend can finance Basse's wedding, even Valborg accepts the plans.
A foreign criminal gang makes a large-scale bank coup. The suspicion falls on the Olsen Gang. They escape, take up the hunt for the real criminals and thus it all starts. The police are looking for the Olsen Gang, and they are looking for the real criminals.
Egon and the gang is about to commit their biggest heist – stealing 6 millions from an undercover operation at a freight company. The money is stored in the most advanced security vault ever constructed, guarded by professional gorillas.