Rupert Winslow, traffic superintendent of the railroad that employs Helen as operator at Lone Point, receives a telegram stating that his wife, who is ill, will be on the midnight express. He calls in Summers, a veteran brakeman on the passenger run and instructs him to watch over Mrs. Winslow and to sidetrack her sleeper if she requires medical attention.

Barstow, a crook, conceives the idea of buying old automobiles, staging "accidents" with them, and settling with the railroad. At the Lone Point crossing one of his machines is hit by the train and the flagman is discharged because it appears that he has been negligent. Helen, the telegraph operatic, gets a day off and starts for the hills on horseback. She meets Duncan, a railroad detective sent to investigate the increasing number of crossing accidents.

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.

Joe, the Wop, employed in the roundhouse near Lone Point is notified that he has been promoted and will take his place that night as a fireman on the local freight. On his way home he stops at the station to tell Helen, the operator, of his good fortune. As Joe starts down the track towards home, Scarlotta, a member of a notorious vendetta that has marked Joe for death, shoots him from ambush. Helen sees Joe fall in the middle of the track and barely succeeds in dragging him to safety out of the path of the limited. Joe's wound is not serious and that night he takes his place as fireman on the freight. Determined to "get" Joe, Scarlotta visits the station where Helen is still at her key and after binding her and locking her in a closet, throws the switch so that the freight will collide with the cars on the siding.

Bert Morgan and "Squint" Booth are freight agents for rival railroads concerned in getting the contract for hauling the gold ore produced by the Mogul Mountain mine. The contract finally falls to the road employing Morgan upon his promise to have cars in operation over an abandoned spur track within three weeks' time.

Film #112 in the Hazards of Helen series.

Film 111 of the Hazards of Helen film series

Film #110 in the Hazards of Helen series.

Film #109 in the Hazards of Helen series

Film 108 in the Hazards of Helen series

107th film in the Hazards of Helen series

Film 106 in the Hazards of Helen series

Film 105 in the Hazards of Helen series

Film 104 in the Hazards of Helen series

Film 103 in the Hazards of Helen series

Film 102 in the Hazards of Helen series.

Film 101 in the Hazards of Helen series

On a visit to the State Prison with Superintendent Melvin of the construction camp near Lone Point. Helen gains the friendship of Butler, a former telegrapher who had been wrongfully convicted on circumstantial evidence. Butler is soon to be released and Helen promises to aid him.

Stallings' plot to spoil the demonstration of Dick Benton's newly invented safety stop for trains seems certain of success when the locomotive is sent running wild down the tracks. Helen saves the day by climbing out on a wire stretching across the tracks and dropping to the speeding engine.

Dick Benton, a young attorney of the railroad, is on his way to the Capitol to deliver evidence involving Riggs in a conspiracy arising out of a fight with the railroad over a franchise. At Lone Point he learns that by leaving the package to be picked up by the express it will reach the Governor sooner than he can bring it on the local.

The new superintendent scoffs at the men's fear of Engine 3615, and declares that it must be put into service at once. Engineer Kent, a veteran of the road, refuses to take the throttle and is discharged. Dick Benton, a young engineer, is induced to take the engine out and "kill this talk of a hoodoo."

Helen, by a courageous leap from a motorcycle, reaches the burning boxcar in which the detectives are imprisoned and succeeds in applying the brakes in time to bring it to a stop and save them from almost certain death.

Escaping after an early morning bank robbery, Gentleman Joe and his pal succeed in boarding a freight train headed toward Lone Point. Fearing rightly that a warning has been sent down the line, they secrete their loot in a box car, and, after noting its number, alight and seek cover until after the pursuit has cooled.

Helen, discharged by the superintendent without justification, comes to the rescue when a flat car, loaded with dynamite, is tearing to certain destruction down the grade, bearing the mischievous son of the superintendent.

Greggs, returning from abroad with a large consignment of precious stones, thwarts the first attempt of Gentleman Joe and his accomplice to rob him at his hotel, but they follow him aboard the train the when he is alone on the observation platform they attack him, and a struggle ensues in which Greggs is finally thrown to the ground from the speeding train. Helen, riding through the hills in an auto, comes upon him before Joe and his pal can alight from the train, Greggs gives her the diamonds and tells her to speed away and rush help back to take care of his injuries.

Learning that the driver of the Comet car has been disabled on the eve of the big race, Sinton, a gambler, bets heavily on its rival. But his plans go awry when Gordon, the owner of the Comet car, meets Naroche, a celebrated French driver, and engages him to pilot the racer.

Jud Hendricks, foreman of the construction camp, is being blackmailed by Gypsy Joe, who knows of a dark page in the Hendricks' past. Hendricks and Tom Rasom are rivals for the favor of Helen, with Tom in the lead. The latter, an engineer, is about to take his train out when he finds Gypsy Joe hiding in a boxcar.

Agents of a foreign power are seeking to get possession of the plans of a new aeroplane motor invented by Dick Benton. Under cover of darkness they succeed in their scheme and are escaping in their automobile when it plunges over an embankment near Lone Point.

In a scuffle between the assistant foreman and a discharged employee at the mountain construction camp the latter's revolver is fired, bringing about a dynamite explosion that severely injures many of the men.

Burkett, superintendent of the Western Railway, opposes his daughter's friendship for Dick Benton, one of the company's lawyers, favoring the latter's fellow-worker, Guy Warren. Warren succeeds in putting through a scheme which results in Dick's discharge. The lovers plan to elope and enlist the aid of Helen. But Eleanor's father learns of the move and wires ahead to police officials to board her train and arrest her while he follows in his special. By a daring leap from a handcar to the train Helen succeeds in warning Eleanor of her peril, but is too late, and Helen and Dick are forced to stand idly by while Burkett starts on the return trip in his special, carefully guarding Eleanor.

Ezra Hickman, of Kankakee, is a political aspirant. At a reception in Washington with his wife and daughter Amy he meets the Ambassador of Selim Bey, the ruler of a small European kingdom, Vergania. The Ambassador, seeking an American girl for his ruler, paints a glowing picture of Vergania to Hickman's wife, with the result that she persuades her husband to accept the American Consulate at. Vergania. Amy, the daughter, is enamored of Lieutenant Brice of the U.S. Navy, and reluctantly she agrees to leave him and go with her family.

Hickey, a contemptible character, acts as a spy for the police, keeping them posted concerning the doings of the crooks with whom he consorts. In return, the police, although they despise him, pay him small sums of money for expenses.

James MacDonald, familiarly known as "Slim Jim," who prefers to make a livelihood by stealth rather than by honest endeavor, leaves his wife and young son one evening, and with the assistance of a "pal" succeeds in fleecing a stranger at "Three Card Monte" for a considerable sum.