A couple's bizarre romantic relationship is disrupted by the intrusion of a third person.

Based on satirical short stories by Sir Arthur Conan Doyle about a vain, egotistical Etienne Gerard, a French brigadier serving during the Napoleonic Wars. He thinks he's the best soldier and lover that ever lived and intends to prove it.

Renee Saccard is a pampered, selfish young wife of a middle-aged Parisian businessman who falls in love with her stepson but is driven to the point of madness when her husband tricks the stepson into betraying her.

A group of potential heirs gather in a forbidding old house to learn which of them will inherit a fortune. Later, they learn that a flesh-rending maniac is loose.