Aliens from Outer Space are slowly switching places with real humans -- one of the first being a young man about to get married. Slowly, his new wife realizes something is wrong, and her suspicions are confirmed when her husband's odd behaviour begins to show up in other townspeople.

Discovering Paris under the German occupation through the story of an SS soldier and more generally of Wehrmacht soldiers allows us to follow the daily life on the German side. These soldiers enjoyed privileged status, during their stay, they were led to believe that they belong to a social elite, a status unreachable back in Germany during peacetime. And who better than a German who has led such lifestyle to serve as a common thread and tell this story?