Egon and the gang are hired to stage a robbery of an antique Chinese vase for an economically challenged baron. Naturally they fooled, which infuriates Egon. The gang tries to get back at the baron by switching the vase with a cheap Hong Kong copy. One attempt is made during the barons hunting party, where Egon ends up being bricked up in the catacombs. In another attempt, the gang has to coordinate breaking through several walls at The Royal Theater in Copenhagen with the "Elverhøj" overture.
Ove Sprogøe
as Egon Olsen
Morten Grunwald
as Benny Frandsen
Poul Bundgaard
as Kjeld Jensen
Kirsten Walther
as Yvonne Jensen
Jes Holtsø
as Børge Jensen
Lene Brøndum
as Fie
Bjørn Watt-Boolsen
as Baron Løvenvold
Ove Verner Hansen
as Bøffen
Axel Strøbye
as Detective Jensen
Ole Ernst
as Detective Holm
Buster Larsen
as Master Chef
Bent Mejding
as Royal Theatre Conductor
