Fred rewrites a dispassionate letter from his ex-wife Julia to make it more accessible to their children. But Manon and Peter get so exited they want to move to the States to see their mom and don't believe their father when he explains the truth.
Peter helps an older girl called Sandra to study for algebra in the hope of getting a date out of it. Fred does not look forward to having to team with Margreet for a tennis tournament.
Manon has invited a German exchange student and musician Detlef. Fred makes sure that Detlef spends the night in his son's room and not his daughter's.
Peter has misplaced 250 guilders from his soccer club registry. Fred is excited to have been asked to hold a lecture on being a copywriter at a school.
Long legged Lydia, who used to go to school with Fred, winds him around her little finger for a copy-writing assignment. So much so, that Fred forgets all about his commitments to his children.
Fred objects to Manon attending a House party with her long haired friend Michael. Margreet is not happy about Fred using a friend's computer programme to recheck the finances she already did.
Peter comes home sporting a black eye telling heroic tales of how he was trying to protect a girl. Fred decides to call the principal and gets Peter in trouble with the biggest bully in school.
Manon & Peter have a fifties themed party at school and go as Olivian Newton John and James Dean respectively. After Margreet is robbed she decides to take self defense lessons.
Manon needs money for a school trip, so she answers an add to sell lingerie at home. Of course she tells her father it's a Tupperware party instead of a lingerie party.
Fred insists he and Peter enter a father-son competition at his school so he can finally get revenge on the school bully from his own class. Unfortunately Manon sides with the bully because she is dating his son.
Fred has planned to spend Christmas playing with his toy trains while Peter watches. But Manon and her girlfriend Sabine are banned from their school trip after pulling a prank. To make matters worse, Sabine has smuggled some hashish across the border in Manon's luggage.
When Margreet's old friend Heleen arrives unexpectedly, she lets her believe to be married to Fred and that Manon & Peter are her children. The family decides to play along. Even Trudy introduces herself as Margreet's mother.
