In this drama, a test pilot plies his trade on a prototype medical plane. Unfortunately, when the craft is stolen, he becomes the prime suspect and is grounded. Fortunately, a female flying ace convinces her brother to employ him. Later it is revealed that the brother leads a gang of plane thieves. They take the stolen birds, including the medical plane, and sell them to other countries. To get the crook to confess, the test pilot kidnaps the thief's beloved sister. The ploy works and the purloined plane is returned, the test pilot resumes his old job, and he and the girl fall in love.