Jim, determined to ruin a box car brake test, hides inside, removes the flooring, and ruins the brake apparatus. As a result, the box car runs wild, trapping him inside. Before Helen can sidetrack the runaway, it shoots off the track at Elbow curve, overturning as it topples down the embankment. Helen smashes a hole through the side, braves the flames, crawls into the car, rescues Jim and drags him to safety. But her heroism is too late; Jim dies in her arms.

Helen spotting two jewel robbers sever the telegraph wires and hop onto a passing freight, jumps into a racing auto and takes off in pursuit. In the meantime, the freight's brakes fail, and the train breaks in two. Helen, on a road parallel to the tracks, leaps onto a flat car, runs forward, informs the train crew what has happened, and captures the crooks.

Deering and his gang rifle the station safe and gain possession of some valuable gems; Helen seizes the package and throws it into the river. In order to recover the package, a human chain is formed by the railroad men, which Helen climbs down and attempts to catch the package with her feet. Meanwhile, Deering and his men have boarded a launch, and succeed in grabbing both Helen and the package. Morton takes over a freight train, captures the crooks, and rescues Helen and the gems.

Upon learning that a gang of smugglers are using freight cars to bring Chinamen across the border, the railroad officials order all employees to keep a strict watch for traffic of this nature.

Film 104 in the Hazards of Helen series

When informed by Helen that the rival railroad proposes to cross the Salt Lake's tracks, McKay, Division Superintendent, rushes a guard of men to Lone Point. This temporarily blocks the rival road's plan, but only until its force of men has been strengthened.

Their demand for money having gone unheeded, Garibaldi and his gang wreck Number One. Howard, who attempts to interfere, is battered into insensibility. The criminals then place a note in the man's pocket warning the railroad officials to heed their demands in the future.

Disguised as baggage man, Burgess and Whelan board the train to which is coupled the special carrying Nina Mallotte and her theatrical troupe. The thieves plan to steal the actress' gems.

Beaten by Dun and Corson, Trent is hurled unconscious to the tracks. Helen, who witnesses the attack, drags Trent from the rails just in time to save him from death beneath the wheels of an oncoming train. When the tramp revives, he accompanies his rescuer back to the station.

Crossed telephone wires enable Helen to overhear a plot between Joe and Bill, escaped convicts, to join a number of Chinese who are being smuggled into the country in a freight train.

Climbing into a cab of a freight engine, Bobbie Layson, the son of a station pulls the throttle open. The alarm goes out and Helen, stationed at Lone Point, is ordered to derail the runaway and thus prevent it from running head-on into the approaching passenger train. Fearing for his son's life, Layson phones Helen

Helen, the telegraph operator at Lone Point, receives a telegram for Sydney Wayne, superintendent of the Graham Gravel plant, advising him that the plant has changed ownership and that Stanton Grey accompanied by his daughter Edith, is on his way to Lone Point to inspect the property. Wayne is startled because he has gambled away the company's money and realizes that his books will not balance. Fortune appears to favor him when Grey is carried into the station unconscious as the result of an automobile accident. He extracts Grey's wallet from his pocket but Cole, the gambler, who has trailed Wayne gets a photograph of him in the act. With the photographic evidence, the gambler tries to blackmail Wayne.

Film 111 of the Hazards of Helen film series