Frank excels with his knowledge of the duodenum. Casper says yes to performing as a DJ at a support event for Amnesty International, and Mia is busy getting new perennials for the garden. At the same time, a bunch of young students get to put grills in Frank and Casper's head, and they come out in an eventful game with flirtation, lies and ostomy bags.

Frank and Casper are visiting Frank's childhood home. It's beautiful in the country, and they get to buy the motorcycle with sidecar that Mia has always wanted. But in a very short time, Frank and Casper find themselves in an inferno of accusations that contain stories of storks, a brothel, and a friendship with a pedophile.

Frank is to celebrate Saint Hans with his in-laws, who have long suspected Frank of being to blame for Mia's childlessness. It all starts fine, but before long, Frank is to blame for a family tragedy involving his mother-in-law's wedding dress, second-degree burns, fart bacteria and an honor sport.

Casper, Frank, Mia and Iben are on Bornholm. They want to buy a house, but must first be approved by the owner. They are all trying to make a good impression. Frank thinks the girls should flirt with the owner, Frank himself would show balls if that was what was needed. But he has problems with a bag of frozen shrimp, a stomach ache and a memorial service for the Danish resistance movement.

Frank and Casper have decided to sponsor the monkey Ditmark in the zoo. Casper pushes for more privileges than sponsors usually have. And one night in the city, it all runs off with them, and they end up in the zoo with two girls. It gives Frank and Casper trouble with a monkey lock, a pair of girl panties and a furious accountant.

Pivert and Bodil are getting married. Frank and Casper are invited. Casper believes he has done enough charity work this year and therefore declines the invitation. But a young girl comes in between and suddenly Frank and Casper are involved in a bachelor party, where Pivert wearing breasts sells kisses on the street, and Casper goes crazy due to a mess in his blood type diet.

Frank and Casper have invited Lars Hjortshøj into their company. They are going on a 'shake-together' trip to Sweden. Sweden offers lovely girls, fish in the lake and bonfires in the evening. But Lars gets off on the wrong foot with a Swedish 'girl' and before long the three are on the run in the Swedish forests, with the Swedish youth behind them.

Frank and Casper go to celebrity karate with Jimmy Jørgensen, Alexander Kølpin and Jan Gintberg. Peter Gantzler trains the team and demands shut up, pace and direction. That kind of thing is not Frank's cup of tea at all. At the same time, problems arise with Michael Laudrup's one foot, and the story ends with southern eroticism, lies and an ethical dilemma.

Casper is cast by Vibeke Windeløv to play Captain Haddock in a major American film. Kissing series in a bicycle taxi, spending the night in a stranger's home and washing dishes with a wet wipe endanger Mia and Frank's relationship, and Mia wants to fix the water trap. Casper meets his unknown half-brother for the first time, and in a special way, he and the water trap influence Casper's career in the United States.