Grete, the daughter of the widowed Cologne dog tax inspector Joseph Völz, once married a British occupying soldier and followed him to the Scottish provinces. When she now visits her father, he soon realizes that her marriage has gone awry. He tries to resolve the crisis by taking a trip to Scotland, but his insensitive nature causes even more damage, even though he gets on well with his son-in-law - who ensures that the whisky is properly taxed at the local factory.