In May 1485, two of the devil's envoys, Gilles (Alain Cuny) and Dominique (Arletty), arrive at the castle of Baron Hugues (Fernand Ledoux) on the night of a celebration for his daughter's engagement.

The Baron's daughter, Anne (Marie Déa), is set to marry Renaud (Marcel Herrand), a warlord who prefers talking about battle more than reciting love poems.

Disguised as traveling minstrels, Gilles and Dominique enter the castle and use their powers of enticement to ruin the upcoming nuptials.

But, when Gilles accidentally falls in love with Anne, the Devil (Jules Berry) arrives to ensure that any true happiness is destroyed.

Due to the increased censorship during the war, Carné wanted to make a historical and fantastical film that would have little difficulty with the censors.