The aim of this article is to analyze the relationship between ideology and fantastic literature using the example of Jean-Pierre Andrevon's fantastic novel L’Oeil derrière l’épaule. While fantastic literature as a genre is most often the carrier of right-wing, reactionary and conservative values (Lovecraft, Ray), Andrevon remains the specific case of a writer who openly defines himself as a leftist. The analysis of the “ideology-effect” (the unconscious ideological mask of the text according to Hamon) and of the “value-effect” (ideas that the text consciously promotes according to Jouve), as well as Hamon's points of textual ideological value and carriers of ideological distortions, permits a conclusion that the author did not adopt any ideological stance a priori and that the global value (right-wing and left-wing) emanating from the text is freedom.