A pretty socialite / pilot runs into gun smugglers when she lands her plane on a Pacific island.

In Shanghai amidst Sino-Japanese warfare an adventurer (Sanders) collecting money from gun suppliers falls in loves with a French singer (Del Rio).

A songwriter's young daughter (June Lang) begins to dream of stardom when she's offered the lead role in a new operetta.

When delusional madman Roxor kidnaps a scientist in hopes of using his death ray to achieve world dominance, he is opposed by Chandu, a powerful hypnotist and yogi.