Helen, the operator at Hobart, warns her friend Anna, the operator at Montville, that Tim Hudson, a notorious swindler, is headed for Montville. Anna later brings about Hudson's arrest when the man, posing as a minister, attempts to swindle the people of the town. Anna marries Tom Binfield, a locomotive engineer. Shortly afterwards, Hudson escapes from jail. The man secures a position as fireman on the railroad and is assigned to Tom's engine. Tom invites the convict to board at his home. Anna fails to recognize her husband's fireman when the man comes to live at the Binfield cottage. Hudson, however, is filled with an insane desire for revenge upon seeing Anna. An attempt to shoot her is unconsciously frustrated by her husband. The convict thereupon resolves to punish Anna through Tom. Hudson's opportunity comes the following day. Just before their train passes the Binfield cottage, the scoundrel strikes Tom over the head with a wrench. Believing his victim dead, Hudson leaps from the engine. Anna, however, sees Tom's body hanging from the locomotive cab. At frightful risk to her own life, the girl succeeds in saving her husband.