Arend Vogel is moving into the attic. To his dismay, his nosy father comes over to visit uninvited. Onkel X and Opa are also snooping around in the young teacher's room. Hansje panics when she has misplaced her diary.
Terwijl meester Arend Vogel de zolderkamer betrekt, is Hansje haar dagboek kwijt. Met daarin gevoelige geheimen. Als Arends nieuwsgierige vader op bezoek komt, is hij niet welkom.