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...