After crashing his plane in the wilderness, a young airborne forest ranger is nursed back to health by a mountain man and his pretty daughter in this 18-chapter serial from Universal.

A stirring drama of Wall Street manipulation of the world's wheat supply, which leads the characters into adventures and danger in various corners of the globe.

Inventor Al Simpkins develops a new airplane fuel, "Economo," which he claims gets a thousand miles to the pint.

Dick Morgan, formerly a professional crook, returns from the war as the "Ace" of his squadron.

Lieutenant Willis returns home from France, where he was an aviation ace, to find that his father has been falsely jailed for the murder of Judson Blair.

Bruce Torrence is an aviator and member of the secret service. His rival for the hand of Zella Wingate is Juan Lascelles, a drug smuggler. To get rid of Torrence, Lascelles loosens a wheel on one of his planes, but Zella is the one who goes up in it. Torrence goes up in another plane and attaches a fresh wheel to Zella's plane. In spite of his efforts he later finds her in Lascelles' arms.

Special agent Al Langdon pursues elusive gem smuggler Michael Revere. Going undercover, Langdon joins Revere's gang, and in this capacity is obliged to rescue their beautiful hostage, Mary Lacy.

A pilot and a gold mine owner go up against the evil Black Hawk, who has invented a plane that can take off and land without using a runway.

When the Great War breaks out, brothers Roy and Monte Rutledge, each attending Oxford University, enlist with the Royal Flying Corps.

A Swahili village is affected by disease. The nearby diamond mine is using this as an excuse not to ship diamonds back to HQ in South Africa. The mine president has sent a doctor, his beautiful daughter and her caregiver to find out what is going on and to cure the natives. They are travelling on foot. To speed things up the president sends his ace flyer up...