Anti-Catholic and anti-cleric policies in the Mexican state of Tabasco lead the revolutionary government to persecute the state's last remaining priest.

A university chemistry professor experiments with an ancient Mayan gas on a medical student, turning the would-be surgeon into a murdering ghoul as part of a plan to steal his lover.

A doctor is driven into an investigation of sinister goings-on at a horse race track by his mystery writer ex-wife.

On America's frontier, a St. Louis woman marries a New Mexico cattleman who is seen as a tyrant by the locals.