Borden, who nurses a secret grievance against Helen, awaits an opportunity for revenge. The girl telegrapher receives a message which informs her that the freight of which Easton is conductor, is to wait at Workman until the Fast Mail passes. Helen turns a copy of this order over to Easton, placing the original, containing his signature, in her file. Easton, however, forgets instructions and is terrified when he sees his train rushing into a head-on collision with the Fast Mail. The man leaps from the freight, landing on his head. The collision is averted in the nick of time. Easton, rendered insane, disappears. Borden, seeing a chance for revenge, destroys the original order. Consequently, Helen, unable to produce it and prove that she had had it signed by Easton, is suspended. Later, a detective comes upon Easton, who is hopping a freight. Helen witnesses the struggle between the two. Borden also sees Easton and in his effort to get the man out of the way, plans to dynamite the train. Easton succeeds in hurling the detective from the top of the car. Helen, however, lassos the insane man and drags him to the ground. At the same time, Borden's dastardly attempt is discovered and he is placed under arrest. Helen is exonerated and restored to duty.