Tony Dumont (Rory Calhoun) is none too trustworthy at the beginning of Flight to Hong Kong. A dealer in contraband goods, Dumont is the bane of his girlfriend Jean Blake's (Dolores Donlon) existence. She wants him to go straight, but the other woman in his life, novelist Pamela Vincent (Barbara Rush), wants him to remain a crook--the better to provide material for a book she's writing. Dumont has a belated change of heart when he steps on the toes of the Mob once too often. Flight to Hong Kong also includes brief stopovers in San Francisco, Honolulu, Tangiers and Macao.