Sjakie 'De Octopus' Massini attempts to pick up Pamela at singles bar 'Cupido'. He suggests they introduce their mutual friends Karin and Willem to each other.
Sjaak has lied about Willem being a doctor. During their second double date with Pam and Karin, a man at another table becomes ill and a medic is called for.
Pam wants to tell Sjaak she's not interested in him, but when her ex husband shows up with his new girl, she suddenly needs Sjaak to play her boyfriend.
Sjaak has fixed a couple of rooms at the hotel next door to Café Cupido for himself & Pam. Willem & Karin manage to get the bridal suite by the same means, but unfortunately it is already occupied.
Sjaak insists that he and Wim go to a singles weekend in Groot Bakerland and woo the ladies with music. When they arrive, Pam and Karin are already there.
Karin has fallen for the apparently very wealthy Alex Hazelaar. Although her friends all try to warn her that she is being gullible, one by one they begin to fall for Alex's charms.
Willem has bought a ring and wants to propose to Karin. But Sjaak manages to talk him out of it, takes the ring and in a spur of the moment presents it to Pamela.
Sjaak is about to meet Pam's little boy, unaware that Mark is 19 years old already. Meanwhile Karin is getting tired of Willem's three rowdy children Maurits, Irene & Willem-Alexander.
The two couples have organized a combined wedding. But Sjaak's mother cannot get along with Pamela and soon all four of them want to call the whole thing off.