The movie begins with the Jönsson gang making a minor burglary. It goes wrong and the gang leader, Sickan, gets caught. After he has spent 10 months in jail, Vanheden and Rocky come to welcome him when he's released. But he doesn't take notice of them, and he's picked up by the mysterious banker Wall-Enberg Jr. instead. He wants Sickan to perform a burglary in Switzerland, in order to retrieve the famous Bedford Diamonds. Sickan does this but is fooled by Wall-Enberg and nearly gets caught. When he returns to Sweden and re-unites with his old gang members, he's set on revenge, both physically and psychologically...
Gösta Ekman
as Charles-Ingvar "Sickan" Jönsson
Ulf Brunnberg
as Ragnar Vanheden
Nils Brandt
as Rocky Blom
Siw Malmkvist
as Eivor
Jan-Olof Strandberg
as Crime Commissioner Svensson
Tomas Norström
as Detective Holm
Per Grundén
as Wall-Enberg
Weiron Holmberg
as Biffen
Bengt Stenberg
as Bill
Hans Sundberg
as Doctor Schmetterlink
Urban Sahlin
as The Gymnastics coach
Jean-Paul Chakbazof
as The Sheik
