In a lush Laotian valley, two scientists-rivals in research, politics, and love-make a world- shaking discovery that can save mil- lions of lives-and upset the balance of world power.

WHO WILL GET THE SECRET FORMULA? Dr. John Merchant wants to contribute it to the cause of world peace. Dr. Chan Thornton, his col- league and foster-brother, is determined to give it to the Chinese Communists, who will use it as a weapon. Just across the border, Communist troops prepare to seal off the valley. And at the laboratory, the two scientists wage a grim battle for survival. To the winner goes prestige, power-and the woman they both love.