Son Martin makes moonshine whiskey, owning and operating a profitable still in Prohibition-era Kentucky. One day, he gets a visit from an old Army acquaintance, Frank Long, who is now an Internal Revenue agent. Long is willing to look the other way in exchange for a percentage of Son's business. But when he is unable to persuade Son to cut him in on the profits or even reveal where the moonshine is hidden, Long sends for the dangerous Dr. Taulbee, who uses more violent methods in getting what he wants. (Wikipedia)