The Mogul Mountain Mystery

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

Sterling and Ella steal a jewelry salesman's sample bag and make their getaway by boarding a passenger train. Word is flashed ahead to Helen, who in turn notifies Bowring, a railroad detective. The train is flagged.

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.

Communicating with his pals outside, Daly informs them as to the date upon which he is to be taken from the jail to State's prison. Kling, the head of the gang, arranges to hold up the train carrying Daly and effect the man's rescue.

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.

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.

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, 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.

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."

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.

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.