A potentially lost film, this film tells the story of a man is convicted unjustly of a crime and then subjected to inhumane torment in a prison run by corrupt administrators.

After Mary Carroll's husband learns that she has had an affair, he challenges her former lover to a duel and is killed. Mary is thrown out by her husband's wealthy family and separated from her little boy, John Carroll, Jr. Years later, John Jr. falls in love with Ruth Fulton, the daughter of the horse trainer for Rex Burleigh. When her father dies, Ruth accepts Rex's offer to care for her, but she leaves the expensive apartment he has provided when she learns his true motives.

When jockey Jimmie Driscoll, responsible for making Jim Richardson's horses winners, is fired for being too heavy, he goes to the home of the late Judge Bell, the father of local horse racing. Jimmy is in love with the Judge's daughter Joy, who was left nearly penniless when her father died. Joy's brother Harry writes to her pleading that because he desperately needs money, she should enter the aging Vagabond, the last of the Bell racehorses, in the upcoming annual event. Convinced by crooked bookmaker Spike Bradley that Vagabond will win at twenty-to-one odds, Harry mortgages his half of the house for gambling money. Jimmie discovers that although Vagabond runs horribly on normal turf, she is a "mudder," meaning that she goes into a wild dash on wet ground. After Jimmie and Joy pray for rain, Bradley, learning of Vagabond's condition, threatens the jockey, but Jimmie, riding Vagabond himself in in the rain, wins the race and afterward, Joy's love.

An innocent country girl, Mary Ellen Ellis, moves to the city with an experienced man, Walter Benton, under the promise of marriage. Once in the city, she finds herself in a "world of crime" but reforms a burglar named Bull Clark. Clark, in turn, saves her from another criminal called "The Weasel," and repays her with his gratitude.