Norwegian engineers are searching for oil and Egon Olsen convinces his friends to buy stocks in the oil market. In the process, Egon, stumbles upon a scheme to fool the Norwegian Government that there is indeed no traces of oil in the North Sea. The Olsen Gang tries to tell the ministry the truth about the oil but they are caught by Sheik El-Altan who, in order to make sure the boys keep their mouths shut, kidnaps Valborg and brings her to Egypt.

Olsen-Banden skal udføre en betroet opgave for selveste Statsministeriet: H.C. Andersens originale fjerpen skal stjæles fra det Danske Export Museum, det gælder angiveligt Rigets sikkerhed og gode omdømme. Men Hallandsen har igen taget røven på Egon.Der er intet mindre end den danske nationalfølelse, Egons ære og 30 millioner på spil. Men Egon har en plan - han skal bruge en boremaskine, et glas honning, en flaske økologisk sveskejuice og en god bunke døde rotter.Christiansborg sættes på den anden ende, metroen forsinkes mere end sædvanligt og Dronningens gardere danser pludselig cancan.

Hearing about the Kings Jewels hidden deep in a silver mine, the Junior Olsen Gang embark on a thrilling hunt to prevent the Jewels from landing in the wrong hands.

Rock'n'Roll and bananas has arrived the country, and Egon has found out about sabotage plans about a circus, in order to take it over.

Follows the Junior Olsen Gang as they hunt down missing tax money stolen from a bank in 1835.