While Grandpa and Grandma are on a boat trip, nosy neighbor Ms. Pronk from no. 25 has been doing the cooking and cleaning for the Knots household. She has also been hinting at the possibility to send the elderly couple off to a home. Hansje and Meester Vogel have taken the opportunity to organize a party for the children in his class in the attic.
Opa en Oma maken een reisje. Iedereen profiteert van hun afwezigheid. Arend Vogel houdt meteen een kinderfuif op zolder. En buurvrouw Pronk maakt zich onmisbaar in oma's keuken. Kon dit maar eeuwig duren.
