Under the influence of liquor, Griffin foolishly displays a roll of bills. Wheeler and Walter, yeggmen, see the money and trail the traveler to the station. The men learn the berth he is to occupy. Hastening to a bridge under which the train must pass, they drop to the roof of one of the cars when it appears. Helen, transferred to Burnett, is a passenger on the train. By mistake, Griffin gets into her berth. Because of the man's condition, Helen consents to allow him to keep her berth. The girl takes the one which Griffin's ticket calls for. An hour later, Helen is awakened by a peculiar noise outside the car. Hastily dressing, she sees the window being raised. Wheeler's face appears at the window. The man foils Helen's attempt to shoot him, disarms her and then climbs back to the roof of the car. Helen pluckily follows, although the train is traveling at a good speed. Walter thereupon cuts the rope leading to the roof. Helen drops but catches hold of the window ledge. The noise attracts the crew and the train is halted. Helen is rescued, and although an attempt is made to capture the crooks, they escape. Shortly after she assumes her duties at Burnett, the girl sees two men attacking the postmaster and recognizes her assailants. After giving the alarm, she pursues the men. Walter and Wheeler flee. Helen overtakes them and pluckily engages them in a battle. The yeggmen are about to slay her when help arrives. Another desperate struggle ensues and the desperadoes are finally subdued and placed under arrest.