An employee at a jewelry store falls in love with a woman who secretly plans to rob the store.

Prosecutor Etzel discovers that his father has sentenced a man, Leonardo Maurizius, on mere presumptions. He then makes it a point of honor to trace the sources of the case…

To try solving the strange disappearances of 11 young Parisian women, the police obtain the services of Adrienne Charpentier, friend of the latest missing person.