Bertus and Sjaan bet each other that they can sell their ware faster than the other. He tries to sell Lex and Laurens Jan new desks, she offers them time clocks for their office.
Sjaan assumes a fur coat to be a present for her 12 and a half years wedding anniversary. Bertus for his part has no idea what the upcoming celebration is all about. Luus has put forward Laurens Jan to be the new chairman of a committee against animal cruelty.
When a record Bertus recorded in his youth as 'Bert and the Bees' turns up on the radio and a compilation album, Bertus first wants to sue, and then wants to get the band back together.
Bertus is installing an alarm and gets some help from old crook Harrie van de Bor. The next morning there are signs that somebody visited the office in the middle of the night without the alarm going off.
Lex and Laurens Jan have a falling out and decide to go their separate ways. Laurens Jan keeps the law offices upstairs, while Lex moves into Bertus small office downstairs. Sjaan also has her eye on the small office, for her new job as telephone saleswoman.
Bertus has hired a camera - complete with cameraman to shoot advertisements disguised as a documentary. Laurens Jan is invited to appear on the 'Ver van mijn bed Show'.
Luus and Bertus feel depressed after Sjaan puts them on an 'Astronauts' diet. Laurens Jan has secretly entered Luus in a Secretary of the year contest.
Sjaan forces Lex to abide to new house rules, one of which is: no pets allowed. But his new flame Margot leaves her dog Dirkie for a day, leading to lies and misunderstandings all round.
Laurens Jan is concerned about this receding hairline. Bertus is selling Ruud Gullit wigs. Lex has made two dates with two different women at the same time. Sjaa is holding a cosmetic presentation.
Bertus inherits 100.000 guilders from an old crooked buddy, Louis "De Neus" Duinhoven, and immediately has the police on his doorstep. No matter where he turns, he is unable to get rid of the money.
Laurens Jan is afraid Lex wants to get rid of him. Bertus and Sjors are trying out East German listening devises and Laurens Jan overhears exactly the wrong things, worsening the situation.
Lex is defending Jaap Melkert against his lodger Caecilia but Laurens Jan falls for the accused. Bertus is planning a surprise for Sjaan with a certain Anja, which naturally makes Sjaan very suspicious.
Bertus is selling tap water labeled as mineral water. Luus is nervous about appearing on the television program "Klant is Koning" and has a rash. She blames Bertus' 'mineral water' when it gets worse.
Lex agrees to help a young gypsy woman get her boyfriend out of jail because Laurens Jan refuses. Soon, Lex is being forced to marry the girl by her gypsy papa.