Ruth, a telegraph operator, is engaged to Billy, a lineman. Her flirtations with the men on the road cause frequent quarrels between the lovers. Her mind distracted by one of these flirtations, Ruth gives the conductor of train No. 7 wrong orders. Later, comes the terrible knowledge that because of her carelessness, the train is rushing to meet the express coming from the opposite direction. In her extremity, Ruth sees Billy approaching on his motorcycle. She tells him of the collision which threatens the lives of the scores of passengers. Billy mounts his motorcycle and, taking a shortcut, goes in pursuit of No. 7. Just as he overtakes the train, Billy's motorcycle breaks down. When about to give up in despair. Billy sees a semaphore by the side of the track with the signal set at "Proceed." Whipping out his revolver, the boy shoots at the semaphore wires, severing them. The signal springs to "Danger,'' as the train approaches. The engineer brings his train to a halt. At the same instant the express speeds around the curve. The sight of the train ahead causes the engineer to clap on his emergency brakes. The express comes to a stop just as the cowcatchers of the two trains meet. His quick wit brings promotion to Billy. Ruth, her folly brought home so forcibly, is cured of her flirtatious habits forever. But Billy takes no chances. He informs her that there is just one position she can fill without being a menace to the road's passengers, that of his wife. Looking up into his face, Ruth meekly agrees.
