Pursued by the police, Saget usurps the identity of a man who was returning to his town after having made his fortune in the United States. Under this new name, he deceives his compatriots with the exception of a doctor and the savage Isabelle. During an explanation Saget understands that Isabelle secretly admires him. She denounces him and Saget surrenders without a fight. Thus he ruins all his prestige with the young Amazon.
At the Conservatory of Vienna the students only have eyes for their beautiful singing teacher, tenor Eric Walter.
A man is shot In the hotel of an imaginary South American country. Clarence and Montès, two inspector students, must solve this murder, but they don't know that dead guy is the USA public enemy No.1.
