New York City cop Phil Donlon leaves the force to join the U.S. Olympic team. When he falls for a Marine colonel's daughter he gets kicked off the team. Joining the Marines to win the Colonel's approval many adventures follow.

The evil Dr. Wong abducts prominent scientist Dr. Edwin Millstone. Bumbling bank guards Tom and Monte search through Chinatown to find Dr. Wong and rescue the professor.

China, 1930s, during the ravaging civil war. General Pen entrusts O'Hara, an intrepid American adventurer, with the mission of providing a large sum of money to Mr. Wu with the task of buying weapons in Shanghai to help end General Yang's tyranny that keeps an entire province under his ruthless iron boot.

Joyce Reid, a wealthy young debutante, stows away on a cargo ship to China, carrying as passengers her dashing aviator sweetheart, Dan Bailey and and her munitions-producing father, E. J. Reid and an assortment of the usual south-seas characters along with some Asians with varying agendas. The cargo included a shipment of bombs and machine guns. She soon finds herself being held hostage and they will free her only if Dan agrees to pilot a bombing plane for some Chinese bandits.

A crazed scientist needs primates to conduct experiments to prove his own theory of evolution, so he organizes an expedition into the jungles of Borneo to capture the animals he needs.