Dunn plays a pilot who's hired to test a new, specially equipped medical plane. When the plane is stolen, he's the chief suspect and is grounded. Gifford is an ace female pilot who convinces her brother, Pawley, to give Dunn a job. It turns out that Pawley runs a gang which steals planes
and sells them to other nations, and he was behind the theft of the medical plane. Pawley is devoted to his sister, and Dunn kidnaps her in an effort to trap Pawley and prove his innocence. The plot works, and Dunn gets the plane and the girl.