
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.
Rupert Winslow

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.
1917-02-17
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0.0Claim jumper Dave Marco and his boss Earl Foster, a crooked investment broker, hire chemist Ralph Brandon to falsify papers that a certain worthless mine is valuable then convince Ralph's mother to invest all her money in the mine. Ralph’s sister Holly meets Jack Mason, whose mine is actually valuable though not yet profitable, and they fall for each other. Once Mrs. Brandon finds out she has been duped, though forced into silence by the threat of having Ralph’s malfeasance exposed, and Marco attempts to jump Jack’s claim events come to a head until the happy conclusion.
0.0Vera Souroff, a young Russian girl, is kidnapped off the street and raped by one of three officers of the Czar's guard. The crime is brought to the attention of the Czar, but Vera cannot tell which of the three officers is the guilty man. The Czar orders Count Nicho, the eldest of the three, to marry the girl, turns over the trio’s fortunes to her and imprisons the men. When the revolution breaks out, at the risk of her own life, Vera saves her husband knowing he holds the key to the identity of her attacker.
0.0Helen receives a cypher message about a jewel robbery and trails the yeggmen to their lair. Discovered, Helen is bound and gagged and thrown into a box car, but gets loose, and leaps to the ground from the speeding train. The crooks are captured, Helen's pluck wins Billy's heart, but, as usual, she refuses, with an eye on next week's adventure.
0.0When Dick, an aeronaut is wrongly accused of shooting Dan, a trouble-making, quarrelsome cowboy, Helen aids his escape on the outgoing Black Diamond Express.
0.0King attempts to tighten the brake of a freight car standing near the summit of a steep grade at Lone Point. Suddenly, the brake chain snaps and the train commences to roll down hill. Helen sees King's peril, rides to a point just before a curve, crawls hand over hand across a rope which she has stretched across the track, and snatches King from the car moments before the car is dashed to pieces as it leaves the rails of the curve.
0.0A wagon load of powder explodes, destroying the railroad trestle under which it is passing; Helen, knowing that a passenger train is due within a few minutes, climbs aboard a freight car which coasts down a steep grade near the trestle. As it nears the structure, she applies the brakes, leaps to the ground, crawls across the burning trestle
0.0A crooked mine owner attempts to hijack his rival's shipment of ore, but Helen foils his plot by jumping onto the engine and pulling the throttle wide open, eventually exposing the unscrupulous villain.
0.0Sharky, a rival road agent, plots to spoil a trial run to be made on Helen's road that will win a mail contract. He opens a waste valve on the tank of the engine, and, when nearing Lone Point, the water tank runs dry. Helen comes to the rescue by mounting the new gasoline speeder and starting off with the mail for the end of the run.
0.0Jim, 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.
0.0Helen 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.
0.0Deering 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.
0.0When 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.
0.0Their 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.
0.0Upon 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.
0.0Under the influence of liquor, Griffin foolishly displays a roll of bills. Wheeler and Walter, yeggmen, see the money and trail the traveler to the station. The men learn the berth he is to occupy. Hastening to a bridge under which the train must pass, they drop to the roof of one of the cars when it appears. Helen, transferred to Burnett, is a passenger on the train. By mistake, Griffin gets into her berth. Because of the man's condition, Helen consents to allow him to keep her berth. The girl takes the one which Griffin's ticket calls for. An hour later, Helen is awakened by a peculiar noise outside the car. Hastily dressing, she sees the window being raised. Wheeler's face appears at the window. The man foils Helen's attempt to shoot him, disarms her and then climbs back to the roof of the car.
0.0The bad blood existing between Reardon and Haley results in a fight in which Reardon is worsted. Reardon, vowing vengeance, climbs back aboard his engine while Haley resumes his station. The fight is witnessed by a number of railroad men. In climbing back to the water tank, Haley stumbles and falls between the cars.
0.0A quarryman, dismissed because of intoxication, blames Billy, the mail clerk, and seeks revenge. He steals several sticks of dynamite, climbs to the top of the mail crane and ties to the explosives to the mail bag. Helen sees what is taking place, climbs to the arm and unties the dynamite. With the passenger train a short distance away, she hurls the explosive away just as the train approaches.
0.0Hanging from a rope over the track, the detective seems certain to plunge to death when the oncoming train splits the knot of the rope which has been tied to a rail and slung over the bridge girder. Helen's presence of mind and nerve in swinging out over the river on the other end of the rope and thus balancing the detective until the train has passed prevents the terrible catastrophe. Later, when pursuing the culprits, Helen once more takes her life in her hands by throwing a lasso from the hand car on which they are pursuing the freight over the brake beam, and then crawling hand over hand to the top of the car.
0.0Helen, 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.