After Sumsemann the beetle loses one of his arms to a troll, he invites brother and sister Peterchen and Annaliese to join him on a journey to the moon in a quest to retrieve his lost arm.
While on a longer business trip, a wannabe poet urges his beautiful but more simple wife to answer his overly swollen love letters. With no idea how to respond she forwards the letters to a new young school teacher to use his answers instead...