Betrayal and espionage abound as an experimental aircraft is readied for its maiden voyage.

Duke and Jeanie Benson, an outlaw couple hiding out under assumed names. Duke realizes that he has a winning sweepstake ticket and will win $150,000 if he can cash it…

Mary Rutledge arrives from the east, finds her fiancé dead, and goes to work at the roulette wheel of Luis Chamalis’ Bella Donna, a rowdy gambling house in San Francisco…