Gloria asks Frank to guide an American agent into the interior, unaware at first that the man is General MacArthur and he's seeking the defense plans for the Malay peninsula. '
Frank agrees to help a Nisei intelligence agent on a trip to infiltrate Japanese intelligence and to free a friend trapped in a pseudo prison run to provide slave labor for a local maharajah. '
Frank's old friend Wilmer Bass asks him to take care of the Serengeti Kid, an old show lion who's sporting a golden collar sought by the leader of a dangerous killer cult. '
Ali and H.H. must find Frank and Gloria when their plane crashes in the jungle, a plight made more urgent by Frank's desperate need for medical treatment. '
Frank and Ali agree to guide Run Run Lee, an arms dealer, to the hidden headquarters of a warlord who claims to be a descendant of a Japanese samurai. '
Frank gets involved with a missionary and her young charges when a downed American pilot dies at her mission after passing on information needed in Singapore. '
Frank competes with an old friend and rival to see who can capture a black leopard for an important client, while Gloria tries to recover the stolen jewelry of an important American woman. '
The new American consul to Singapore asks trapper Frank Buck to search the interior for a missing American agent carrying the Japanese plans for an invasion of the Malay Peninsula. '