In Paris, in the beginning of the Twentieth Century, Cesar Charron owns a theater at the Rue Morgue where he performs the play "Murders in the Rue Morgue" with his wife Madeleine Charron, who has dreadful nightmares. When there are several murders by acid of people connected to Cesar, the prime suspect of Inspector Vidocq would be Cesar's former partner Rene Marot. But Marot murdered Madeleine's mother many years ago and committed suicide immediately after.
Jason Robards
as Cesar Charron
Herbert Lom
as Rene Marot
Christine Kaufmann
as Madeleine Charron
Adolfo Celi
as Inspector Vidocq
Maria Perschy
as Genevre
Michael Dunn
as Pierre Triboulet
Lilli Palmer
as Mrs. Charron
Peter Arne
as Aubert
Rosalind Elliot
as Gabrielle
Marshall Jones
as Luigi Orsini
María Martín
as Madam Adolphe
Ruth Plattes
as Orsini's Assistant
