Uuno Turhapuro is searching for a job and takes a correspondence course in tour guiding. Eventually he gets a job in a small travel agency and takes a group of Finnish tourists to Marbella, Spain. Unfortunately Uuno's father-in-law Tuura is in the group, too, with his wife and daughter, Uuno's wife Elisabet. Tuura tries to get a signature to an important paper from a minister who's having a holiday in the area. Meanwhile, Uuno just relaxes and enjoys the sun.
Two brothers from Häme discover that they are actually from Karelia. During the celebration of the newfound fact, one of the brothers is bitten by a bug. After seeking medical help from a doctor - who tries to tell the brothers that he is not a doctor of medicine - the doctor decides to trick the boys by convincing them that the insect in question is called Insectum propellatum, also known as the aviation bug, and unless the affected brother learns how to fly, the bite might turn fatal. During their shenanigans, they become acquainted with a robot that runs on booze, two scoundrels, and the beautiful Miss Universe!
Uuno's nose is proved to be so good, that he can smell behind the display window what goods are on the other side. With this fabulous smell talent Uuno is chosen to Police's police-dog school as a student among the other dogs. Meanwhile Director Tuura, Uuno's father-in-law has been chosen to a very high office and thinks that Uuno is just gaining bad reputation for him, so he decides to broake Uuno's and Elisabet's marriage.
It is the first anniversary of Uuno and Elisabet. Uuno has placed a bet with his friend Härski-Hartikainen a year ago, that if Uuno can take just one year of marriage with Elisabet, Hartikainen will treat him a festive dinner. However, Hartikainen buys a lottery ticket for Uuno, who agrees to deduct it from his debt – and the festive dinner is reduced to a can of milk and half a sausage. As it happens, Uuno becomes the lottery winner of 1.5 million marks, only to soon realize he doesn't own a single penny yet. Mister Tossavainen arrives and offers to finance Uuno before he actually gets the jackpot. Thus, Uuno gets to live a rich live on credit. He buys a raccoon fur, leopard swimming trunks and a couple of Mercedes-Benzes. Women begin to fancy Uuno and so does his father-in-law. As time goes by it is revealed, though, that Uuno is not actually a lottery winner, and so he has to escape the anger of others to Härski's car repair shop.
Uuno goes with his wife to spend summer holiday to their villa in country, studies playing of the violin in a correspondence course and constructs an own violin with do-it-yourself-method, but quits his career when he perceives that takes his free time too much and comes back to live the life "in the shadow of a fridge". In the start scene of film a priest (Ere Kokkonen as voice) says in the Uuno's weddings that his complete name is Uuno Eero Turhapuro, whereas it's in the all later Uuno-films Uuno Daavid Goljat Turhapuro.
Two outlaws, The Lonely Rider and the Indian Tonto, have caught (at least they think they have) Speedy Gonzales, a ruthless gunfighter from the town of Njietponimaistadi. They start to travel to another town for the reward, through the desert without water and fighting against Indians. And just to find out that they have made a full circle back to origin.
Baron Wilhelm von Tandem, CEO of the Tandem Corporation, gets mixed up with a spitting image of himself, an innocent country boy Kalle. Both characters conveniently amnesiac, they start living each other's lives and dating each other's girlfriends, succeeding in their new roles better than in their original ones. Level-headed Kalle soon spots the bad guys who are after the Baron's money, and the Baron brings innovative ideas to the countryside.