Le Grand Vampire, under the alias of a real estate broker ‘Treps’, meets Juan-José Moréno (Fernand Herrmann), a businessman, who asks for an apartment with a safe. Le Grand Vampire puts Moréno into an apartment whose safe is rigged to be opened from the rear through the party wall of an apartment belonging to Irma Vep and le Grand Vampire. However, the case Moréno places inside......