Mulvaney (John Archer) and Cling Marshall (Douglas Dick), operators of a small-cargo airline which flies food into French and Viet Namese forces fighting the Communists invaders, are asked by the local American consul to keep an eye out for a lost American geologist, Professor William Marlow (Rory Mallison), and a secret Red base. No sooner said than done. Returing to their base, the Americans are captured by the Reds and in their escape and recapture, come upon the geologist, who is a prisoner at the secret base. Complications are added by the additions to the American party of a Chinese orphan boy, Jake (Hayward Hoo Soo), a pregnant widow, Ellen Philips (Maura Murphy), of a third airline employee Swede Philips (Don C. Harvey) , and the American's pretty French secretary Cleo (Jean Willes). With some difficulty, the Americns escape from the base, with information vital to the success of the French cause. In a finale of mostly newsreel clips, Mulvaney and Marshall return with French paratroopers to destroy the Communist base and revenge the murder of Jake.