Nightclub gangsters hire a vaudeville act called the Three Funny Bunnies (Ritz Brothers).

One dark and stormy night, an escaped convict, an embezzler, a runaway daughter, her intended and her father, and a gangster take refuge in a remote inn called "The Black Raven" after the nickname of a second gangster who owns it; and murder ensues.

The invention of a machine that can cause remote explosions brings the attention of Scotland Yard and Bulldog Drummond.

A girl is engaged to the local richman, but meanwhile she has dreams about the legendary pirate Macoco. A traveling singer falls in love with her and to impress her he poses as the pirate.

A woman is married to the son of a doctor, the proprietor of a private sanatorium, where she is under unwilling treatment. Both the son and the doctor indicate they want the marriage dissolved. Arriving at the scene is a mysterious personage identified as the doctor's cousin who formerly was a stage magician in Europe. He is accompanied by a threatening dwarf.

After several female motorists begin disappearing en route to Twin Falls, a Hollywood screenwriter and the cousin of his bride-to-be discover that they've all been abducted by the mysterious Dr. Marlowe, who is attempting to resurrect his dead wife.