Spencer Chan

In 1942, after the fall of the Philippines to the Japanese, U.S. Army Col. Joseph Madden stays behind to organize the local resistance against the Japanese invaders.

Soon after a Chinese princess comes to the US to buy planes for her people, she is murdered by a poison dart fired by an air rifle.

In Singapore, a private detective and the British authorities are on the trail of a crime syndicate that kidnaps a nuclear physicist with the aim of selling him to the highest bidder.