Dr. Henry Jekyll experiments with scientific means of revealing the hidden, dark side of man and releases a murderer from within himself.

Young Frank McLain loses his position in the east, and resolves to go west to prospect for gold. Arrangements are made that he leave his wife at home, and send for her later, as soon as he has found a position. Frank's prospecting proves a failure, and he is without funds, when his plight is made more severe by receiving a letter from Alice, his wife.

Dan Coughlin, a ranger, comes upon a band of smugglers and succeeds in capturing one of them, a half-breed Mexican, "Easy" Joe by name. Joe is taken to headquarters and locked up, while all efforts to wring a confession from him as to the whereabouts of the band's rendezvous have failed. It is not long, however, before the others of the gang make an effort to liberate their pal and send an Indian to spy upon Dan and other members of the troupe.

A stirring Western drama presenting as its principal character a man who is at once ranchman and bandit

Pretty Molly is afflicted with a peculiar nervous disease and after having tried many doctors is finally referred to a certain great specialist, who has had success with cases similar to her own. To briefly describe Molly's ailment would be in stating that the muscles of her throat and neck were uncontrollable, causing her to throw back her head in a way resembling a person beckoning to another.

George Maxwell, a young cowboy, rescues a fever-stricken Mexican prospector and carrying him to an inn in the vicinity like a good Samaritan, pays the innkeeper a sum of money to care for the stricken man until he recovers.

Two young men of a western town, Will Phelps and George Arden, are in love with the same girl, the belle of the village. Having been pals from boyhood they decide to let the girl choose between them and to abide by her decision without argument or malice. Jessie chooses Phelps, and Arden, although deeply hurt by her decision, presses the hands of both and wishes them happiness. Several years elapse during which time Jessie and Will are married and the latter has become sheriff of the county. It is then that Arden returns and the two men are apparently happy in being together again.

Andy Carson, puncher on the Lazy X ranch, is in love with Gladys, daughter of Col. Pierce, the ranch owner. Gladys likes the young puncher, but when Jack Brinsley, a young Eastern friend of her father, comes to spend Christmas at the ranch, she speedily transfers her affection to the Easterner.

Harvey Barton, a young cowboy, is happily in love with Kate Bowers, a pretty western girl. One day he calls at her home, shows her a handbill advertising a barn dance to be held at one of the nearby ranches, and asks her to go with him. On his way back to the ranch he comes upon a beautiful young woman, whose horse has met with an accident and Harvey dismounts and bashfully asks her if he can be of any assistance. She accepts his help and invites him to accompany her home. She is inclined to flirt and easily turns the foolish young cowpuncher's head, and the meeting ends with him inviting her to accompany him to the dance.

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

'Spike' Shannon, a pugilist by occupation, signs to fight a 10-round bout, with another young knight of the ring. A contract is drawn and 'Spike' and his backers leave the office of the promoter. On the street they encounter a young couple, evidently at outs, but which proves later, upon the girl's explanation, to be a flirtation, in which she has no desire to take part. The masher has insolently insulted her. 'Spike' takes in the situation at once and with his strong right arm knocks the dude sprawling.

Young Harry Farman and Eloise Wendell are engaged to be married. Harry is a wealthy young fellow and Eloise is a society girl, and both find pleasure in their clubs and other such luxuries that the city affords the fashionable, wealthy set. Eloise, who has rode a hobby of philanthropy is engaged with her club and other clubs, who are holding a tag day, the funds to go to the children of the poor. Eloise, with another friend, invades a saloon in a fashionable hotel, and are invited to have a drink by two men seated at a table. Eloise, in fun, lifts the glass to her lips when Farman enters. The match is broken off and the next day Farman, with a friend, goes west.

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.

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

Henry Carter, a forester, has but one falling, that of drink. Despite his efforts to cure himself of his terrible habit, temptation is always stronger than his will, and Agnes, his daughter, is in despair. Finally persuaded to take treatment at a sanitarium by Rev. Small, Carter decides to give it a trial.

"Bullets" Brown, the hero of our story, is a rare track tout, and a true type or this particular parasite.

Maizie Mackey finished with her term at boarding school in Los Angeles, leaves her sweetheart, Bud Stone, and returns to her father's ranch near Ash Forks, Cal. A few weeks later, Bud, lonesome and downhearted, wires Maizie's father that he is coming on to ask a very important question.

Jake Walters and his wife, Millie, arrive at Lizardhead, Arizona. They have learned that Mrs. Riley, proprietress of the hotel, has advertised for a waitress and Millie is sent to take the position. Millie is pretty and soon has all the village swains breaking their necks to gain her favor. From "Stump" Willetts to "Lank" Henderson, every cowboy within a radius of ten miles of Lizardhead is led to believe that he is the pretty lady's choice.

Nellie Blair, the niece of a wealthy ranchman, and an orphan, comes in make her home with her uncle, and shortly after her arrival finds that the whole "Circle A" outfit, every manjack on the place, is in love with her.