José Mojica plays a singing vacquero who stops off in la cantina to have muchas cervezas with los muchachos. While José is all beered up, he boasts that he can tame the wild mare -- a horse no man can ride -- owned by local ranchero Don Alvarado (a stolid performance by Carlos Villarias). While he's in the neighbourhood, José also boasts that he can tame the Don's daughter, a Mexican spitfire played by Mona Maris.

A maid with a checkered past falls in love with the son in the posh household where she works, and gives him a baby.

Heli's misfortune begins when her mother, the landlady, marries for the second time. The man is bossy and brutal. In an argument between stepfather and brother, Heli intervenes: She throws a hatchet, the stepfather falls and is killed.

A female escapee from a reform school joins a pickpocket academy in Paris.

In the second film of the series (and not a second part of anything), Gay Lawrence, aka The Falcon, is about to depart the city to marry his fiancée, Helen Reed, when a mystery girl, Rita Mara, asks for his aid in disposing of a secret formula for making synthetic diamonds. He deliberately allows himself to be kidnapped by the gang for which Rita works. His aide, "Goldy" Locke, trails the kidnappers and brings the police. But the head of the gang escapes, and the Falcon continues the pursuit.

The Falcon travels to Mexico where he gets involved with murder and a mysterious painting.

In 1847 Buenos Aires, a young noblewoman and a young Jesuit fall in love, much to the disapproval of her family and the Church.

Fox's immediate follow-up to its successful early-talkie western In Old Arizona was 1929's Romance of the Rio Grande. The story focuses on the Alvarez family of Mexico, specifically fabulously wealthy Don Fernando. Intending to bequeath his vast fortune and estate to his long-estranged grandson Pancho, Don Fernando must contend with his ne'er-do-well nephew Juan.

A code expert working for Naval Intelligence is assigned to decode enemy messages despite his desire for active duty.