A chain of impossible robberies throw the museums into confusion. Mysterious individuals, living to an incredible age, purloin all the existing versions of “ The island of the Dead ”, the famous painting by the Swiss artist Arnold Böcklin. Perhaps it’s simply a question of a mania of that has taken hold of inveterate collectors, but this is only a vain hope and the Detective of the Impossible knows this. How can thieves be stopped if they are literally able to disappear into thin air ? And what secret is hidden in the stolen paintings ?