This is an example of the Dark and Stormy Night motif. A maniac from an insane asylum escapes and makes his way to the house of his wealthy sister. Once there, she enlists him in playing a nasty prank on several heirs to her fortune. She uses a drug to make her look dead with the idea of being revived later. This will force the vultures to attack one another. Meanwhile, the nut case brother begins a little killing spree. The down side is the black servant who is treated like dirt. Of course, he is a mass of stereotypes, typical of the time period.
Review of The Hidden Hand
