Down and out, Bob, an engineer, drifts into town. His condition excites Helen's sympathy. Using her influence, the girl secures him a position with the railroad. Rankin, Dalmore and Dougherty escape from prison. The men attempt to enter the Hobart Tower, but Helen, seizing a revolver, baffles them. Rankin, climbing up a telegraph pole nearby, daringly swings hand-over-hand along the wires until directly opposite the window of the tower. Catapulting himself forward, the man crashes through the window and lands in the room. Helen is captured. The approach of Helen's relief causes the convicts to hide themselves in a closet. They cover the girl with their revolvers, threatening her with death if she betrays their presence. Helen, however; notifies her relief of what has happened by tapping the message on the table with her finger. The man departs to give the alarm. The convicts emerge and prepare to hold up the Fast Mail. Leaving Dougherty to guard Helen, Rankin and Dalmore leave the tower. The train is approaching when the telegrapher succeeds in her daring ruse to capture her guard. How she frustrates the convicts and brings about their capture is stirringly shown in the climax of this episode.