A pair head to the frozen wastes with an expedition in search of radium deposits. Certain members of the group succumb to greed, plotting to bump off the others and claim the radium for themselves.

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.