Egon plans to exploit knowledge gained during his latest term of incarceration. By stealing the unmanipulated financial records of DanInvest he obtains the majority of the stocks in the department store Magasin du Nord, just in time for their closing sale. The attempt to get the red suitcase that will save the day they rob the main vault at the EEC headquarters in Brussels and end up hijacking a tank.
As usual, Egon has an ingenious plan. And, as usual, it works just fine until one of the gang members makes some kind of funny error. This time, however, even Egon's life is in danger, for some international criminals try to get rid of him by throwing him into a container filled with acid.
Criminal genius Egon Olsen presents his accomplices Benny and Keld with yet another infallible plan that can only end badly. The booty is a red suitcase containing values worth five million. The sinister mastermind Bang-Johansen carries the suitcase. The Olsen Gang follows him to Paris, where they put their cunning and carefully organized plan into motion.
