On a tramp steamer off Central America are Mr. and Mrs. Sheppard, five prisoners en route to a Nicaraguan prison, and Corbett, an American carrying money for a Honduran counter-revolution. Denied permission to land in Honduras, Corbett releases the prisoners and with their aid hijacks the ship. They land, taking the wealthy Sheppards as hostages, and start the arduous trip upriver to Corbett's rendezvous, meeting jungle hazards
Glenn Ford
Ann Sheridan
Zachary Scott
Rodolfo Acosta
Jack Elam
Stuart Whitman
Stanley Andrews
Ric Roman
Rico Alaniz
Paul Conrad
Mel Welles
Michael Vallon
Charles Soldani
Julian Rivero
Joey Ray
Paul Marion
John Mansfield
Pepe Hern
Ron Gans
Henry A. Escalante
Steve Conte
Zarco Carreno
Robert Brown
Stuart Whitman