Frank Morgan is a American Supreme court Justice ("John Grant") who heads off, with his secretary, on a well earned fishing trip. When he arrives in the small town of Crown Port, he soon discovers that local lawyer "Bill Adams" (Richard Carlson) is on a bit of a crusade to clean up the corrupt town by running for mayor - and having quite a struggle at that. Anonymously, "Grant" decides to pitch in and together they try to manipulate the situation and the town's crooked judge "Harkley" (Porter Hall) to their advantage. Morgan is on fine form here, he has a bit of a glint in his eye and the film ...