 A mysterious blackmailing gang known as the Black Aces is terrorizing the local ranchers. Sandy McKenzie (Kay Linaker), daughter of the owner of the Half Moon ranch, and rancher Ted Ames (Buck Jones) are in love. They quarrel and Ted rides to town where he meets Jake Stoddard (Bernard Phillips) and Len Stoddard (Fred MacKaye)who lure him into a card game and he loses his ranch. Jake goes with Ted to take over his ranch, and Jake is mysteriously shot. Ted pursues the killer and is gone overnight. Len accuses Ted of the murder and declares him a member of the Black Aces. Sandy and rancher Henry Kline (Raymond Brown)arrange for bank loans to meet the demands of the Black Aces. As Sandy rides home, Ted overtakes her and convinces her he did not kill Jake and is not a member of the Black Aces. Boyd Loomis (William Lawrence) and Lem Stoddard ride up and cover Ted with a gun with intentions of taking him to the sheriff. Kline helps Ted escape on Boyd s horse, and Ted finds the money Kline gave the blackmailers in Boyd s saddle bags. Ted goes to the gang s headquarters where Sandy is being held prisoner. His horse Silver leads a posse there in time to hep Ted free Sandy and capture the Black Aces gang, and leader Loomis.