The Marquis of Languedoc, sinister and insane criminal on a grand scale, celebrates the annual ball in his main residence, the medieval castle Saumur.
The high society of the Southern France is presented, and too Alex Decker and Denise Heart are invited. Knowing it is a trap, they although take part.
When they arrive in the knight hall, the Marquis cheerful raised his glass to their welcome. part one of his plan is checked.