The Sun Never Sets (1939)

When Clive Randolph finally returns "home" from Gold Coast colony, younger brother John balks at following the family Colonial Service tradition. But back in Gold Coast, one Zurof, nominally studying ants, pursues a hidden political agenda that causes worldwide unrest; the Colonial Office persuades both brothers to go back and deal with it. Young John makes a mess of things, then must save the day on his own.