Ex-baseball player Bill Johnson, failing at many jobs when his ball-playing days are over, reluctantly takes the advice of his father-in-law, Jonah Evans, a retired umpire, and enters an umpire-training school. Assigned to the Texas League, he does fine until the championship play-offs when a riot develops over one of his calls. The involved player is knocked unconscious in the proceedings and cannot verify that Bill made the correct call. Despite lynch mob plans to at least tar-and-feather him, Bill's family - his daughters Lucy (Gloria Henry and Susan and his wife Betty - help Bill reach the ballpark safely the next day through a series of hair-raising encounters.