A scientist carrying the secret to a new high-powered explosive must be safely escorted to Washington and ace pilot Bob "Three Star" Halsey is the best man for the job. Moments before takeoff, crooks take control of the flight and steal the formula. Halsey watches helplessly from the ground as the plane goes down in flames and the thieves esape by parachute. His sweetheart Judy, whose brother was also aboard, races to the crash site, only to be kidnapped by the villains. Halsey and his co-pilot Wings risk everything to save her, calling on their world-class flying skills in the film's terrifying finale.

Ivy Stevens is a cafe entertainer in love with a shifty salesman who deserts her. In attempting to commit suicide, she is saved by Carl, a Salvation Army officer. Encouraged by Carl, Ivy joins the Salvation Army. When her old flame re-enters her life, Ivy finds she is still attracted and begins another affair with him.

Lifelong friends and medical school graduates Mary Stevens and Don Andrews decide to set up office together. While Mary struggles to earn respect because of her gender, Don gets caught up in his ambitions for a bigger life.

When his import/export business infiltrated by international diamond smugglers, Mr. Moto must follow a trail of clues littered with beautiful women, glittering gems and deadly assassins. Making his way from the mysterious streets of San Francisco's Chinatown to the dark and dangerous alleys of Shanghai, Mr. Moto will stop at nothing to bring the culprits to justice...even if it means making the ultimate sacrifice!