In a large fish export company, the general manager's talented son Hugo holds a trusted position. When one day 500 kroner is missing from the cash register, speculation begins about who the culprit might be. Greengrocer Olsen is a happy man, completely satisfied with the lot he has been allotted in life. When he is drawn as a juror in the case against the general manager of the fish export company, he is beside himself: he has no idea. But who is the culprit anyway?

The noble knights of yesteryear - like the Three Musketeers - threw themselves carelessly into battle to save a lady's honor. The knights of our time are on motorcycles - and they are used for that. A young girl is to be married - but before the wedding she is pressured by an ex-boyfriend who wants to publish her letters to him. Four friends go on motorcycles to Stockholm to sort out the peas...