A young woman, Molly Marble, is enmeshed in a train robbery by her crooked step-father. She meets a stranger, Jeff Morton, and suspects he knows where the loot is hidden. For the sake of her relatives, she must try to 'vamp' this information from him but, instead, she falls in love with him.

Cowboy Tom Gallagher, escaping from a saloon fight with Black Carter and Thug Peters, rescues Little Joey and his dog--who have been sent "parcel post" to Dorothy Manning's Bar M Ranch by her sister--from an approaching train. Tom completes the delivery and is hired by Dorothy as foreman. There he finds Carter and Peters, who have been rustling Dorothy's cattle and stealing right and left from the Bar M. Peters buys up the mortgage and then kidnaps Dorothy when Tom goes away to get the money to pay it off. Tom effects her rescue with the aid of Little Joey and Bendy Mulligan, a rheumatic old cowpuncher. The mortgage is paid off, and Bendy's accidental discovery of oil while taking a mud bath solves Dorothy's financial problems. Dorothy and Tom wed.

A cowboy searches for the man who killed his brother.

Tom Duffy, whose father is the half-owner of the Flying-U Ranch, spends half his time reading movie magazines and the other half with Mary Smith. Mary and her kid-brother, Frankie, are heirs to the other half of the Flying U, and wards of Tom's Father. Tom's interest in movie magazines is Pandora Golden, the movie vamp. Tom is thrilled when he learns that Pandora's next film will be shot on the ranch.

John O'Connor and Jim Rollins, rival ranchmen, each has a baseball team, though Rollins' usually wins because O'Connor's foreman and pitcher, Bide Goodrich, is paid by Rollins to throw the game. When Tom Hanley and his grandmother settle on O'Connor's ranch, the boss discovers that he is a good pitcher; and Rollins, who has bet heavily on the Fourth of July game, plots to eliminate Tom.

Tom Blake, en route to the bank to draw money to pay off the mortgage for Felton, his boss, is intercepted by Trumbull, acting for Purdy (who holds the mortgage). Blake escapes and swims ashore to a private school for girls. There he meets Marjorie, Felton's daughter, and on their way to the ranch they are kidnapped by Trumbull and taken to a deserted cabin.

Migual Garcia, a somewhat arrogant Spaniard, alienates pretty much all of the residents of the Flying U Ranch except the owner's young son, Chip Bennett. Dunk Whitaker, who owns a neighboring ranch, has secretly been rustling Flying U cattle and steals a contract guaranteeing the Flying U's rights to a particular waterhole. Not only that, he decides that he wants Bennett's pretty niece, Sally, for himself. Just when things look their darkest, it turns out that Miguel is not quite what he seems to be.

When heavyweight contender Battling Jack Riley uses the Bar X Ranch for his training quarters, foreman Tom Buckely becomes concerned over Riley's attentions to Frances Morris, the owner's daughter, whom Tom loves. Gerald, Frances' twin brother, confesses to a theft of money from the bank in which he works, and to retrieve the money Tom agrees to fight Riley for three rounds, to the disgust of Frances.