Tom Milford, foreman of the Hayden ranch, and Sylvia Hayden, daughter of the ranch owner, are in love. Hayden has been notified that Archie Hollister, son of an old friend in the east, is coming to visit the ranch. Just before Hollister arrives, a cowboy brings word to the ranch that Simms, a troublesome neighbor, has been illegally interfering with the ranch supply of water. Hayden and Milford ride out to stop Simms and have a quarrel with him. Meanwhile Hollister, the tenderfoot arrives carrying a bulldog. Later it develops that Simms is engaged in selling ammunition across the border to Mexican revolutionists. He learns that the authorities suspect him and thinking to divert suspicion from himself and at the same time get revenge on Milford, he conceals a box of ammunition in Milford's bunkhouse and sends an anonymous letter to the sheriff, suggesting that a search of the bunk house will disclose important evidence. Milford is taken in custody when the ammunition is found in his quarters. Before things have gone very far Hollister, whom the cowboys have been joking and hazing, discovers that Simms is the real culprit and causes his arrest and reunites the lovers.
