The driving instructor Gustav Helbig is satisfied with himself, because he got his "hardest case" to date, the hairdresser Egon Kammerhahn, through the driving test. However, Mrs. Berta Helbig is dissatisfied, as she urgently wants to go into town to do important errands. This also includes a visit to Thea and Paul Brause's dog grooming salon, which is booming because every third inhabitant of the town owns a dog. Thea takes care of the beauty of the animals while her husband trains them. In marriage it is exactly the opposite, because here Paul is on a leash.