 Tom Reed s adaptation of the "Saturday Evening Post" story by Eli Colter finds Texas wrangler Tom Kilpatrick (Sonny Tufts) persuading the ranchers of the Pecos area, led by John Rambeau (Edgar Buchanan), to buy a Brahma bull on a cooperative basis to improve their depleted cattle strain. The bull escapes, due to the carelessness of Windy Lucas (George Hayes as George  Gabby  Hayes.) The mishap is seen by Larch Keegan (William Bishop), young rancher in love with Cherry Lucas (Barbara Britton), Windy s adopted daughter. Larch, jealous of Tom as a rival for Cherry and for water rights, fixes the blame on the wrangler. The bull terrorizes the countryside, injuring farm women and killing other bulls. Larch and his brothers, Hoy (Joe Sawyer) and Happy (Gordon Jones), incite the ranchers to shoot the bull on sight, but Tom begs for time to capture it alive. Tom corners and lassoes the bull in the hills, but his horse is no match for the bull, who escapes again. Tom then sets out to capture the Widow Maker, a famous wild horse, knowing the horse is the only one capable of holding the lassoed bull. He does so and trains the horse in secret. Larch grows so jealous of Tom that he vows to burn down his ranch house. To prevent this, Cherry marries Tom but the latter, discovering why Cherry rushed into the marriage, refuses to live with her as man and wife.