The Blue Fox (1938)

Ilona, a beautiful Hungarian woman, is the neglected wife of Stephan Paulus, a scientist who is more interested in the fishes he studies than in his better half. Tibor Varny, a handsome - and famous - airplane pilot, starts courting her. Ilona does not say no but Tibor suddenly steps back. For a simple reason: the flyer has just realized that Ilona is the wife of... his best friend! In frustration, Ilona turns to Trill, a tenor showing off to his best advantage...