Two jobless Americans convince a prospector to travel to the mountains of Mexico with them in search of gold. But the hostile wilderness, local bandits, and greed all get in the way of their journey.

Retired wealthy sea captain Jim McKay arrives in the Old West, where he becomes embroiled in a feud between his future father-in-law, Major Terrill, and the rough and lawless Hannasseys over a valuable patch of land.

The story concerns two agents, one Mexican (PJF) and one American, who are tasked to stop the smuggling of Mexican migrant workers across the border to California. The two agents go undercover, one as a poor migrant.

In 1850s Mexico, the beautiful owner of a silver mine is kidnapped by a bandit leader, who needs money to finance his revolt against the Emperor Maximilian.

A small rancher is being harassed by his mighty and powerful neighbor. When the neighbor even hires gunmen to intimidate him he has to defend himself and his property by means of violence.

A young woman, abandoned by her womanizing fiancé, is forced to provide for the upbringing of her son and combat the difficulties of being an unmarried mother during the strife of early 20-century Mexico.

After the mysterious disappearance of an oil well owner, one of his workers, Gerardo assumes the business management. Soon, the owner's sister arrives from Argentina, and, believing that Gerardo killed her brother to keep the wells for himself, she starts working as a singer under a false name in the same casino her brother disappeared, in order to find out what exactly happened.

When he unwittingly sends some of his men into a trap, pirate Captain Peter Blood decides to rescue them. They've been taken prisoner by the Spanish Marquis de Riconete who is now using them as slave labor harvesting pearls from the sea.

The period is the 1840s and California is part of Mexico. Many of the citizens wish to become part of the United States. Other countries are also interested and the Russians have established bases in the northern part of the state. To further their hold they have stolen guns and Don Arturo Bordega, a leader of those wanting statehood, is out to recover them.

A Confederate officer travels to a wild Mexican border town to buy guns, aiming to keep up the fight against the Yankees - but who can he trust in this lawless place?