With ruin staring him in the face, Manning, of Manning and Company, commits a theft which averts the crash. The scoundrel cleverly contrives to throw suspicion upon Reynolds, an old and faithful employee. Reynolds receives a three-year sentence. Beatrice, the daughter of Manning's victim, believes in her father's innocence. Led to believe Manning the real cause of her father's tribulations, Beatrice vows to wreak vengeance upon the scoundrel.

Helen, the telegrapher at Downing Junction, receives word that an engineer has been accidentally shot by a partridge hunter, and the runaway train will collide with the Eastbound Express. Helen jumps onto a nearby standing locomotive, opens it up full throttle, catches up the Express, warns the engineer of the impending danger

Helen, a "diamond runner," reaches South Africa.

It shows how a scheming bank employee manages to get an alibi and fix the guilt of his theft on the assistant cashier.

During World War I, John Stevens invents an anti-submarine device, but the plans are stolen by two German spies, the Baron von Wiederholtz and Madame Elsa, who flee to a New York hotel. Stevens' daughter Alice pursues the spies hoping to retrieve the plans.

Blake, fireman of a light engine, receives a message that his wife is dangerously ill. Benton, his engineer, allows Blake to catch an eastbound passenger train. A hunter shooting as the light engine is passing, wounds Benton who drops unconscious. The sportsman reports the accident. Helen, a telegrapher, receives word of the runaway train. Climbing into the cab of a locomotive in a siding, Helen jerks the throttle wide open. The engine rushes after the endangered express. Discovering his train is being pursued, the conductor of the Eastbound Express gives the signal to stop. Helen slows her engine down and tells of the danger. While the Eastbound locomotive goes to meet the runaway, Helen's engine draws the cars to safety. The runaway is halted in the nick of time. Helen's superb heroism results in her being showered with offers of marriage. But she enjoys her hazardous adventure too much to marry anyone yet. —Moving Picture World synopsis