The life of Jim, an icon of the Parisian gay scene, takes an unexpected turn when he contracts He-terosis, a strange virus that transforms gay men into… heterosexuals. From that moment on, everyone turns their back on him except Lucien, his last follower (and first admirer), a young man who hasn't quite accepted himself. Together, they decide to embark on a quest to find a mysterious cure that can heal Jim and, in doing so, prevent the extinction of homosexuality.