Gambler "On-the-Level" Leigh gives up his profession for his little sister, Alice, whose precarious health demands that she move to the mountains. There, the gambler meets the fiery dance hall girl Coralie whose advances he rejects. His funds exhausted from the expense of the move, Level unwillingly returns to his old profession, but Coralie induces the dealer to "cold deck" Level, and he loses every cent. Out of desperation, Level decides to hold up the passengers of the stagecoach while unknown to him, Black Jack shoots and kills the driver for the express box. Learning of the driver's death, Level surrenders himself to the law and is jailed. Escaping from his cell, Level discovers Black Jack uncovering the express box and arrests him. Level returns to town with the real murderer, is cleared of all charges and is reunited with his sweetheart, Rose Larkin.