The Black Diamond Express

A pair of crooks steal a valuable package, hold up the crew of a freight engine, and compel the engineer to aid their escape. Learning this, Helen climbs into the cab of a locomotive standing on a siding and takes up the chase.

Billy Warren, timekeeper on the construction job, arouses the enmity of Brent and Easton when he resents their bullying of the other men. Pay day finds the men celebrating in riotous fashion, and Brent in a crazed moment breaks into the station and attacks Helen. Her cries bring Warren, who trounces the bully.

In the second entry of the popular Hazards of Helen series, Helen, is temporarily assigned as a telegraph operator at Quarry Depot; bad blood springs up between two men who are seeking Helen's favor, but to whom she has remained impartial.

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

Hanging 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.

The new superintendent's first order on taking the post eliminates the men whom he terms old, which costs "Pop" Bates his job as Helen's relief operator. His next declaration is that active railroad work is no place for women, and Helen is also dropped from the service. While Helen is breaking the news to Bob Bates, the new superintendent is hustling about the road yard speeding up the work. "Put more snap into your switching," he tells the men. A minute later, while he is making an inspection inside a boxcar with defective air brakes, a switching engine rams the car. The force of the impact, heightened by the recent orders, throws the superintendent to the floor stunned, and starts the car on the down grade. In the few moments it is speeding along the road and there is consternation among the men for a washout down the road means that it is headed to certain destruction.

To prevent a three mile journey around the mountain the telegraph wires at the construction camp have been strung over the precipice from the station on the mountain top. The operator is discharged when the superintendent suspects him of treachery and Helen is transferred to the station. Later, after the former operator has enlisted the aid of crooked brokers to use his knowledge in ruining the value of the road's stock, he receives an opportunity to get revenge on the superintendent.

Through an accomplice the band of conspirators preying on railroads succeed in having the boxcar loaded with auto tires sidetracked at Lone Point instead of being taken on to its rightful destination. They are getting away with the valuable shipment when Helen takes a hand in the affair. While each of the trio carries a load of tires back to the autos which are in a sheltered spot, Helen hurriedly climbs the side of the boxcar and releasing the brakes the car, with its heavy load, starts down grade at great speed.

Fearing lest Cameron's horse beat the pony he has plunged on, Tony Dorgan orders one of his men to bribe the stableman to drug the animal. Saratoga Johnny tries to carry out Tony's order, but receives a beating at the hands of the irate Cameron employee.

Whispering Smith, a railroad detective, is sent to Medicine Bend to suppress the looting of cars.

The film is about a woman who experiences frightening visions after visiting an insane asylum where one of the inmates claims to be Count Dracula (here following the Hungarian spelling Drakula). She has trouble determining whether the inmate's visions are real or merely nightmares.