Koos & Mien have offered up their Saturday to help put up wallpaper for Dr. Lydie and Hans. Gert Jan has brought home psychology student Pien, who, unlike his usual girlfriends, made him sleep on the couch.
Mien and Koos are practicing a little song and dance act for the wedding of their niece Joke. Pien is writing an essay about sex and violence and Mien misplaces Pien's study material: a collection of dirty magazines.
Mien has said yes to Lydie doing an interview. Lydie insists that Mien join her for the photograph. Lydie and Hans go away for a weekend so they can get away from their busy schedules and plan their wedding day.