Mississippi belle Isabelle and her hard-headed, quick-tempered Jersey fiancé Henry arrive at an Italian speakeasy in New York. They meet an amiable retired judge there, but Henry's back is up immediately anyway. Henry leaves as his car is parked illegally. Isabelle likes the opera, and it happens that her favourite singer, Di Ruvo, is a bar patron that evening. "Gus", as he prefers to be known, is very charming. Henry returns to find the pair dancing. A row ensues; Henry leaves. Isabelle accepts Gus's offer to retire to his apartment even though he warns her his intentions are "strictly dishonourable". But Henry has told Officer Mulligan that Isabelle has been "kidnapped by villains"...