Despite his talent as a musician, a city boy decides to become a boxer. He's successful as a fighter — much to the dismay of his parents. When gangsters try to by a piece of him, he begins to have second thoughts.

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.