Occupants of a London boarding house become suspects as a string of murders are discovered.

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.

Sal comes to the Barbary Coast from New England to find out who murdered her brother. She gets a job signing in Dude's saloon, falls in love with Dude, then wonders if he might be involved in the murder.

A documentary examining the early days of horror films, particularly those crafted at Universal Studios during the 1930s.