Per Grundén

A German business man, Volkswagner, comes to Österlen in the south of Sweden to build Deutschneyland, a gigantic amusement park for German tourists. The local councilors and the member of parliament are all in favor of the idea, although it will turn vast areas into parking lots for cars. The Lindberg family does not like the idea and with the help of a little magic, they start scheming against it.

Vanheden and Dynamit-Harry, together with Harry's fiancée Doris, are in Mallorca while Sickan is still in Stockholm. However, Wall-Enberg wants him to do a break-in at Cardinal Wulka's in Mallorca. He can't resist this and goes down there. However, Wall-Enberg can't be trusted. Sickan is fooled, caught and put in prison while waiting for transport home to Sweden again. After Vanheden and Harry have broke him out of jail, he's, naturally, set on revenge. The gang discover that an antiques dealer called Germann has something to do with the whole thing and that she's also collaborating with Wall-Enberg. The gang then decide to take a closer look at her and her antiques and they discover that there's a coup being planned against the cathedral in Parma.

Sickan has a new plan. This time, the gang are going to steal a small computer micro chip which contains a top secret plan of what the government intends to do with Sweden in the future. But, Wall-Enberg is also planning to steal the chip. The payment will be 55 million Swedish crowns in gold and diamonds to whoever can deliver the chip to the foreign investors. Who will grab hold of the chip, the Jönsson gang or Wall-Enberg?

Sickan, Vanheden and Rocky try to rob the Berns nightclub one night, but Vanheden has made the mistake to invite his constantly drunk cousin, the old dynamiter Dynamite-Harry and he ruins the plan. Sickan is arrested, and has to spend 10 months in a small, locked room. When he is released, he has a new plan, but Rocky and Vanheden have decided to go straight. Together with Dynamite-Harry, Sickan plans to rob a cold store, managed by their arch-enemy, Wall-Enberg.