Frasse is turning 50, and it will be celebrated with a bang. Linda, Mats, and the others are preparing a surprise celebration, and they are busy keeping everything a secret from the curious Frasse.
Linda takes Mats and Frasse to Stockholm to visit her brother Filip's filming of "Alla mot alla." The gang has high expectations: Which celebrities will be there? Will Mats and Frasse meet any girls?
Mats and Tobbe train with the "Bowling Brothers," who are both gold medalists in the Special Olympics. Frasse lives out his cruising dreams at a vintage car meet.
Tobbe goes to the museum, and Frasse does something he absolutely isn't allowed to do. Mats and Olympic champion Jonathan face their arch rivals in the first bowling match of the year.
Linda goes to Kolmården with her parents to meet her brother Filip and his family. A dolphin show and a lion visit are on the agenda. Åke helps Mats get started with his training.
Åke is inviting Tobbe and Mats to a men's dinner on the balcony. During a shopping trip, Frasse suddenly disappears. Mats is going to his first company party and brings Frasse, the fashion oracle of Köping, as an advisor.
Tobbe is going to help Mats wax the EPA tractor but gets tired halfway through. Mats meets his arch rival at the go-kart track, and Herman finally gets to dance with Sofie at the county dance.
Åke is going on his first date ever and asks Mats for advice. Lars-Åke gets dressed up and takes Linda out for a romantic dinner. And then there is the last taco night of the summer with the whole gang.