It is Coronation Day, and as one well-to-do family prepares to depart for Rangoon, their short-sighted removal man hits it off with their soon-to-be unemployed housemaid, Travers.
When the great and good of London begin being struck down with shock, horror and shame by a mysterious man blowing raspberries at them in the night, it quickly becomes Scotland Yard's most important case.
When his wife suddenly ups and leaves him, Arthur chances upon an odd job man happy to any work that pays - and takes out a contract upon his own life.
At the height of the Great War, the head of German intelligence misplaces his most valuable asset, whilst the Kaiser expects his outgoing secretary to be despatched with. A cross-dressing cat-and-mouse chase to Paris soon ensues.
It is 2774 A.D. and humour is the national religion. But as the ageing emperor lies on his death bed, his son - His Royal Hahaness, Prince Boffo - is questioning the point of laughter.