There is a crisis when May has no milk in her buffet, and the Minister of Transport decides to pay a visit. Mr Parkin has installed a "Position Closed" sign in the Booking Office, which Ethel has trouble getting to grips with. Mr Skinner sets out to get revenge on Mr Parkin when the latter suggests that he take the day off following his drastic over-reaction to Mr Parkin's solution to the milk problem.