Jack Mason's Last Deal: Old Watson the prospector is the proud owner of a mine and a daughter, Ruth, but when Jack Mason, the gambler, comes to town and opens a faro game, Old Watson loses all his money and mortgages this mine to Jim Sanders, a sneak. Ruth Watson accidentally meets Jack Mason and, now knowing his business, she falls in love with him, and Jack, who has a big vein of genuine manhood in his character, loves the trusting little western girl in return. Finally, Old Watson comes home with ruin staring him in the face. He has lost his last dollar.