Dr. Henry Jekyll experiments with scientific means of revealing the hidden, dark side of man and releases a murderer from within himself.
Old Jim Lacey and his daughter operate a stagecoach in the west. One day, Alice, the girl, meets Tom Percival, a prospector, green from the east, and they fall in love. A few weeks later Tom writes Alice that he has struck it rich and for her to accompany her father on the stagecoach that day and she can ride with him to the claim office.
Young Jim Logan, a miner at the "Little Jonny" mine, is in financial straits owing to the long illness of his wife. Other misfortunes follow when Jim learns of the discontent of other miners and their grumbling at the present wage scale they are receiving. It is finally decided to make demands to the mine owners
Two pals, Jack Manley and John French, are employed on a large ranch in Wyoming. French falls sick with fever and Jack goes for a doctor. This latter, however, refuses to accompany Jack without his payment in advance and Jack, in despair, is forced to depart without the doctor. Back at the bunkhouse he conceives the plan to hold up a pony express rider
Upon the death of her father, Ann Newton is made the heiress of an extensive and valuable ranch in Arizona, when she is visited by the officials of the S.W. Railroad Company, who, seeking to extend the tracks of their company, find it necessary to buy a portion of the ranch. Ann refuses to part with the ranch at any price
Jennie Lee and her father are on their way to Golden California, from a little Kansas farm, traveling in a prairie schooner. At the last settlement visited by the two, the old man, who has a weakness for drink, purchases several bottles of whiskey, which he begins drinking when they have made camp for the night. A lone cowboy calls upon them and finds the old man in a jovial mood and cautions him to beware of the hostile tribe of Indians, through whose country they are now traveling.