An American man identifying himself as a tourist, Jay Wickham, introduces himself to Joe Gaines in an Asian casino. After accompanying Lei Ling to her room, Wickham begins searching for a cache of diamonds believed to be in her possession, but is unable to find them.
On the only available plane leaving for the Philippines, the passengers include Gaines, Wickham and Ling, along with a man named Ross who is Ling's associate and carrying the diamonds, Lorgren (the rightful owner of the gems) and the latter's mistress, Destiny Cooper. A crash landing results in the death of some and serious injury to Ross, who hands Joe the gems before he dies.
Natives begin approaching the plane, ready to kill any survivors and take their possessions. Wickham finds the jewels, kills Lorgren, shoots Destiny and flees, but is wounded by Joe. Before he dies, Wickham tosses the diamonds into a river, as Joe awaits the dangerous natives and his fate.
Dewey Martin as Joe Gaines
Jack Nicholson as Jay Wickham
Fay Spain as Destiny Cooper
Vic Díaz as Lorgren
Joseph Estrada as Garuda
John Hackett as Al Ross
Jacqueline Hellman as Gloria Walsh
Lucien Pan as Police Inspector
Juliet Prado as Lei Ling
Jennings Sturgeon as Bearded Man
