Ruben convinces Bert to sell the house and move to Amsterdam, to be reunited with Patsy and Isa. Joost has however learned about Isa's new boyfriend and therefore refuses to leave. He ends up chaining himself onto the basement wall.
Patsy and Isa have returned home. Joost is extremely happy, especially because Isa wants to continue their romance. Stijn and Kathy however feel like she is playing with Joost's feelings. Patsy meanwhile panics about her lost cellphone.
Ruben organizes aerobics classes, believing those will make him become a total womanizer. Isa is meanwhile very disappointed because her art teacher dislikes her latest work, whereas Bert and Patsy told her it was a master piece.
Stijn got successfully elected as class president, but is determined to find out who was the one person that did not vote for him. He is very disappointed when it proves to be Joost. Patsy gets hired to star in an energy drink commercial.
Patsy is frustrated since Bert cannot shut up about Fiona, his apprentice at school. That evening, Ruben organizes a party in the basement. It soon looks like Bert is cheating on Patsy, when he and Fiona show up behaving quite intimately.
Joost is tired of his brother's pranks and wants to go live with his mother. Kathy is using Stijn to practice French kissing. Stijn however thinks he lacks experience and decides to ask Bert and Ruben for advice.
Ruben shoots a nude picture of Joost and plans to spread it around the school. Bert and Patsy have the chance to go to a concert of their youth idols Duran Duran, however Isa wants her mother to respect their yearly 'mother-daughter-day'.
Joost has pulled a prank in class, but the innocent Stijn got punished instead. Stijn is furious, since this meant his first-ever detention. Patsy meanwhile heavily panics over a wrinkle. Bert tries to calm her down.
Kathy introduces her hockey team mate Lies. The girl insists on joining the basement gang, which makes the guys believe she is interested in one of them. Bert wants Patsy to hire Ruben as her new manager.
Joost, Stijn and Ruben still believe that Lies is interested in them. Before learning that she is actually lesbian, the guys start to use the ultimate seduction tool according to Ruben: a facial tanner.
After failing to focus on his study books, Joost wants to join Isa's art school, as she just gets one easy school task after another. Stijn left home after a quarrel with his parents and asks Joost for shelter.
Joost hides his buddy Stijn in the basement, without informing the family. Ruben is the first one to find out and confiscates food to harass them. Stijn's nocturnal noises downstairs make Bert and Patsy believe a burglar got inside.
Stijn is still staying in the basement, but blows his cover. Bert however invites him to stay, as he discovers their shared passion for DJing. They soon decide to collaborate. Ruben however tries to convince Stijn to go solo.
Stijn is still living in with the family. Joost however is irritated because his buddy replaced him as father Bert's pride. Ruben is meanwhile managing Stijn's emerging DJ career, but seems to heavily abuse his privileges.
Joost is getting more and more harassed by his brother Ruben, urging him to complain about his father's lack of paternal authority. Isa and Kathy want to get a tattoo. Bert demands Patsy to stand up against their plan.
Joost and his friends are playing a game of strip poker. Much to the joy of Kathy and Isa, the guys are losing one round after another. Ruben meanwhile tries to seduce a girl by pretending he is all into charity.
Ruben hates his family members walking in and out of the house, as they prevent him from having intimate moments with his girlfriend Jits. When he announces his plan to move out, Bert concludes he has failed his fatherhood.
Ruben wants to go live on his own, in order to get some privacy with his girlfriend Jits. As he cannot afford anything, he moves in the garden shed. Joost is very pleased he has finally got rid of his obnoxious brother.
Bert wants to celebrate Ruben's return by a family trip to the seaside. His car however breaks down, changing the plan into a garden party. The kids want to vouch for the food, urging Bert to show them the skills of a true barbecue master.
Joost cancels a night out with his buddy Stijn, in order to spend time with his new girlfriend Saartje. Isa cannot hide her jealousy. Bert finds out about the sexual tensions between Patsy and celebrity Rob Vanoudenhoven.
Now that they are back together, Joost hopes to finally have sex with Isa. She is however depressed, as she fears that Bert and Patsy will separate. Ruben semi-accidentally gets them to see relationship therapist Frederickx.
Therapist Frederickx visits the family's house to observe everyone's behavior. Bert and Patsy however do not take kindly to his advice. Isa drives Joost nuts by continuously teasing his dirty mind.