A series of murders are committed near the estate of a degenerate author and his wife.

The Case of the Scorpion's Tail begins with the mysterious death of a millionaire and spirals into the murder of his suddenly rich wife, which draws the attention of a dogged investigator, who follows a trail of blood to the bitter end.

A young girl is brutally murdered somewhere in France. Sometime later, the same thing happens to the daughter of a well-known sculptor. This time the parents (the sculptor and his wife) ...

An amnesiac man begins to think he may have lived a double life.