As always, Sickan has come up with a new plan. This time he wants to rob the IKEA furniture store. During their nightly break-in Sickan discovers that the store is used as a secret smuggling central for sending American computers to the Soviet Union. The computers are picked up by Soviet submarines sneaking into the Swedish archipelago. Naturally, it is their arch enemy Wall-Enberg who is behind all of this.
Gösta Ekman
as Charles-Ingvar "Sickan" Jönsson
Ulf Brunnberg
as Ragnar Vanheden
Björn Gustafson
as Dynamit-Harry
Birgitta Andersson
as Doris
Per Grundén
as Wall-Enberg
Johannes Brost
as Järnarmen
Lars Dejert
as Biffen
Kent Andersson
as Superintendent Persson
Dan Ekborg
as Detective Gren
Jarl Borssén
as The Head Waiter
John Harryson
as Russian submarine captain
Jan Dolata
as Russian diver
