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 smugglers seem in a fair way to escape on a stolen engine when Helen, unhitching a team from a nearby wagon, races down the road towards the railroad bridge from which a rope is hanging directly over the track. Standing astride the two speeding horses Helen leaps to the rope, and swaying in mid-air makes a perilous drop to the stolen engine as it dashes past.
Tony, a half-breed Mexican is kicked from pillar to post, but he grasps a chance for revenge on society when he peers through the station window and sees Helen, the operator at Lone Point, opening the express company bag containing a valuable shipment to a local rancher.
A fall from a semaphore weakens Wood's mind and when he later disappears circumstances point to suicide. His ghostly appearances make the post known as the "Haunted Station," and Helen is appointed as a last resort after many others have quit.
After binding Helen to prevent her from stopping the express train to have it await an armed guard, crooks board the train, disable the messenger and dynamite the safe. Helen later takes a short cut in an auto and overtakes the train, but the crooks leap from the speeding train into her car before she can warn the engineer and train crew.
Apparent carelessness causes Conductor Lawton and his train crew to be laid off for thirty days. A gang of car thieves, pursued by police, jump aboard a freight, and after a stiff combat, succeed in throwing the crew off the speeding train to the ground.
Helen is enjoying a ride on her horse, "Hazard," after her day's work, when news comes that "Red" Purdy and his aides are escaping after making a big haul. When the automobile in which they are escaping breaks down they take to a handcar. Helen pursues them down the track while the Sheriff and his posse set out to head them off on a short cut.
A college boy's prank imperils the life of the railroad president's son who has worked his way up to engineer in his course that starts "from the bottom." Tied to the engine, the son is speeding on a runaway engine toward the Flicker Creek bridge which has been swept away by the floods.
Whispering Smith, a railroad detective, is sent to Medicine Bend to suppress the looting of cars.