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.

An unfaithful servant in the Norwegian Petroleum Directorate tries to sell top secret information to German industry leaders. Egon has a plan to earn money on the transaction himself.

The Olsen Gang is robbed in Spain and loses the millions they earned from their last heist. Egon has a plan to get the money back by robbing the National State Railways for a gold transport.