A secret agent named Marc returns home after an assignment to find his wife Helen acting peculiar. He soon realizes that she`s been having an affair. But it turns out that Helen has been busy in more ways than one: she`s created a monster -- literally -- from the evil within her! And the slimy creature, despite being held in captivity by Helen, has violently killed a number of people. Now, Marc must forgive Helen`s indiscretions in order to save her from the being, which could escape at any time. Awards: Cannes, 1981 - Best Actress, Adjani.